So, let's get back to daily driving Mainline Linux on mobile devices!

I've been running @postmarketOS on an ancient Samsung tablet from 2012. Gotta say, feels surreal that it runs linux 6.x when all the LineageOS unofficial builds for it run on linux 3.x ... quite impressive when you think about it :) (Hardware support is also pretty good, main issue is camera, and stylus which I managed to get working)
I use it for light web browsing and as a kind of smaller laptop when I'm too lazy to carry around my current x86_64 laptop ^^

Sure, pmOS is not yet fully ready, but you can always still find some usecases here and there and excuses to use it daily :)
@fun
>2012 Samsung tab
Mom has a Tab S2 (2014-2015) that she barely uses: it's still a usable device, but the rubber coating has gone bad and she was really worried about the consequences of removing it.

I also have a Nexus 7 2013 with a swollen battery, but I'm honestly more interested in plugging the screen into a motherboard with non-soldered storage and a better set of ports.
That product line could probably have kicked the Macbook Air to the curb (for many users) if it had a keyboard accessory.
@fun
I also have a Vivotab plagued by Windows RT (putting postmarketOS on it isn't as straightforward as it is on the Surface RT)
Dad still gets pretty fired up about Microsoft gimping their full-fat ARM port of Windows 8 by locking out third-party desktop apps.