The Android App support is good, I use Whatsapp and Signal with it, also Firefox and DuckDuckGo browser. Just keep in mind that the Android App support is to get a few apps running that are important to you. Choosing Sailfish also means choosing mostly native apps. The system browser is built on the Firefox engine. SSH support is lovely though. It feels just like desktop Linux.
Don't expect a super slick experience. Companies like Apple and Google are pooring billions into their mobile OS. A small comapny like Jolla cannot keep up with that. Also the Android drivers are as is, the Jolla developers cannot improve on them.
Edit: by the way, it uses Firejail to have apps locked into their own jail.
At the time it was very close to desktop GNU/linux OSes: software in rpm packages, wayland, pulse audio, easy SSH to device. It was easy. I still find myself confused when using Android, Sailfish OS was easy.
Older one plus devices, Motorola devices. The guy who ports to some Motorola phones simply doesn't give up and keeps maintaining his ports up to date.
Here's the status of various devices:
I was asking about Plasma Mobile ( https://plasma-mobile.org/get/ ) that the parent mentioned switching to and I wasn't aware that libhybris is a requirement.
https://wiki.postmarketos.org/wiki/Devices
There maintainers create configurations for those specific devices to make them work well with postmarket OS:
https://gitlab.com/postmarketOS/pmaports/-/blob/master/devic...
Part of this thread: https://news.ycombinator.com/item?id=41754074 [We need a real GNU/Linux (not Android) smartphone ecosystem]
It has some fantastic native & open indie applications, see https://openrepos.net.
If it managed to attract some extra users and gain a critical mass, it could become a credible (niche) alternative. It's nearly there.
But mostly it was (2): on my daily driver phone I need to be connected 100% of the time, things like the Android networking silently failing were a major problem.
The Sailfish guys for some odd reason decide to invent their own "user interactions" where you click-slide ("one handed") to do certain opertaions. This makes the UI not only awkward, but NOT intuitive. You don't know what your options are until you perform this strange operation. I get why they did this, it was a way to potentially reduce swiping, etc but now that we have phones with big screens, you can actually put those options in one UI.
Further, basic things like composing a text and attaching a photo requires a round-trip to the photo app where you 'tag' the images you want ONE BY ONE rather than being able to do this inline from the SMS/MMS application. I think this has gotten better recently but for a long time it was SUPER awkward.
Two other perplexing points was how SLOW the UI felt for what should have been compiled Qt code and poor battery life on the older Xperia devices. Maybe they're using QML and it's not compiled?
The Sailfish guys have what I think is an ugly looking UI as well.
They've "dithered" certain parts of the UI so it really looks like old-school EGA/CGA graphics, even though the display is high-DPI and they have what's effectively a TUI style interface.
The only people I know who "LOVE" or claim "it's the best" UI are the same ones who LOVE Zune and Windows Phone UIs which are basically flat UI, almost monocolor nearly TUI type which is what you see pieces of in Win10 as well. Personally I dislike this UI and so do many people I know, there's a reason why UIs have icons and ideally text labels. TUIs have their place but so do GUIs.
If the Sailfish guys abandoned their weird UI ideas and frankly made it more like iOS or Android (I know, so boring, we have to re-invent the wheel just because...) it would actually be compelling.
On the very very plus side of Sailfish, as someone else pointed out, it's basically a GNU/Linux device that uses RPMs. I was able to install dnsmasq, set up DNS based adblock filtering, curate firewall rules and basically harden the device. You could SSH into the device via USB without adb stupidity and once I set it up, it stayed working until the VOLTE switch-over occured.
I think Ubuntu Touch has a better "UI" (I've also run this) but the Ubuntu guys have basically been ignoring VOLTE and since all major US carriers have switched over to VOLTE, your phone basically can't really make calls now on Ubuntu Touch (but that's OK, they've improved a bunch of other stuff! /sarcasm off).
Ubuntu Touch (not that you asked) is also a LOT slower than it should be and because the Ubuntu Touch guys are pursuing an 'Over the Air' update model, since the OS can basically be overwritten, applications aren't actually unpacked at install time but dynamically at run time. On a desktop this is OK but on a phone it leads to very slow app loading times.
I have high hopes for the current batch of Linux phone projects, Mobian, postmarketOS, etc but sadly I'm on Android until these are fully solidified.
I actually bought a Sony Xperia 10 and sail fish because I wanted the UI back so bad, but unfortunately I have some apps which didn't seem to work with android emulation (mainly banking...)
No doubt Meego innovated on ideas, but just because they came up with something doesn't make it "good" and just because Apple/Google copied it doesn't prove the validity of the idea.
To that point I would prefer we used more screen real estate (Android, iOS, whatever) and REDUCED the usage of gestures, it would end up being faster. It sometimes takes me multiple attempts to swipe from the bottom on a Android/iOS to get it to do something because I have a screen protector and/or case and the way I'm interacting the with the device is different than the developers who might have worked with a "nude" device.
The screen protector/case issue made UI navigation even worse on Sailfish devices because you had to use this gesture inside a program, not just to switch between applications.
Ubuntu Touch also has a swipe, but from the side where a screen protector is slightly less likely to affect it's ability to register the gesture.
It's also more consistent gestures experience than sailfish. Here you know the gestures are basically for "window/app management". Everything else - they look like regular Android apps.