None of them are USB-C and I don't plan on replacing any of them soon.
With the possible exception of external hard drives, USB-C doesn't offer any benefits over my existing interfaces.
No need for a dongle for your DisplayPort monitor, just get a DP->USB-C cable, done, I'm running a 4k monitor at 60hz this way.
Same for your hard drive, it is probably micro-usb on the other side, just get a micro-USB to USB-C.
etc.. etc..
You don't need new stuff, just new cables, which is annoying but not anywhere near as bad. Protocol is the same, just a different shape.
It's nice to know the protocols my devices use aren't redundant, but you won't find me rushing out to adopt USB Type-C cables.
The only port I find myself missing so far is HDMI. Having to carry a USB-C to HDMI adapter (actually multiple since compatibility is an unmitigated disaster) is quite annoying. I rarely use thumbdrives, but carrying a USB-C<->female A adapter isn't a big deal since it's so rare and I can just toss it in my bag.
For a primarily desk-sitting laptop you're getting a docking station of some sort (monitor or actual) so you get all the above ports with it. I also don't upgrade components there very often either. I do admit this was annoying so far - as the release of the laptop far preceded any decent docks. Single-cable docking though is pretty neat, and a definite upgrade if minor.
Really it ended up being a USB-C to HDMI, female A, and ethernet that I need to toss in the bag. The latter two I expect to use a few times a year at most.
I dont get all this so much dongle talk when you just need one good adapter.
I've asked our office admin to purchase the Juice Systems flat dongle with Ethernet, as that one handles gigabit, for anyone who gets the new Macbook.
Also, as far as I know, none of the all-in-one dongles, not even the normal adapter that Apple sells supports 4k/60Hz. Only 30.
Disclaimer: not affiliated, just a good product.
Since I only have 2 ports on my non-Touch Bar model, I really wish someone just made a USB-C hub. All of the existing hubs have USB-A ports and one USB-C only for power pass through, but they can't handle the bandwidth required for certain things like 60Hz 4K. At least I have a gigabit USB 3.1 adapter that gets me ~930 Mbps on my local network.
So weight basically :)
If one upgrades their mac with every new release, it usually ends up being a 200-500 hit per year depending on market conditions. The more expensive peripherals usually will fetch a decent amount on ebay as well.
So for the average cost of around ~$30/mo, one can basically have the latest mac with the latest peripherals all the time.
Or one could upgrade every 5 years as well...
Almost everything you list are things that would be stationary on your desk, so either you are buying the wrong machine if you don't plan on removing it from the desk, or you'll benefit from having all connected to a dock that can connect via 1 cable to your machine.
Pretty sure they don't make USB Type C adapters for PS/2.