Because Amazon has an incentive to keep me as a Prime customer (I'll buy more crap on Amazon). Most people don't pay Google a single cent.
So it's not that I trust Amazon, it's that the economic model for Amazon including unlimited storage in my Prime membership makes sense.
(Note: I wouldn't bet on Amazon staying unlimited for the next 50 years, just providing the counter-argument.)
In the case of Prime I doubt a non-negligible percentage of Prime customers would cancel over losing unlimited storage, so the incentive to keep it unlimited is even smaller.
[0]: https://www.theverge.com/2018/8/20/17761760/twitch-prime-tur...
I encourage a self-hosted solution with backups. There are many, some super easy for non-tech folk to use (synology for example)
Is it a PITA to switch from Google Photos, or is it just a case of installing an Amazon Photos app and enabling sync?
* The AI is fine, although not as good as Google's.
* Albums are far less featureful. The shared link doesn't even show the album title. You can't add text or locations like you can on Gphotos. This makes trip albums less good IMO.
* Scrolling and UI seem faster, although I have far fewer photos.
* Desktop upload is nice for people who have non-smartphone cameras
* Albums list can be sorted by Date Created or Name. GPhotos default sort is by the date of the most recent photo. * Adding and removing from albums seems slower, but is also async, so /shrug
* Selecting multiple photos is much harder- Google allows a Press, hold, swipe gesture to select multiple photos. Amzn doesn't have that on the app. On web, they do have shift+Click, though.
* Different photo layouts is nice
* The shared photo screen is very aggressively in your face about advertising amazon photos. GPhotos has no ads.
* AFAICT, Amzn does not share the accounts/names of signed-in people who access shared content. Gphotos leaks this info to anyone who views the shared content. It's one of my main problems with GPhotos.
I have not really tested the "Groups" feature (which seems to be the equivalent of shared albums).