I am not a developer but an Ubuntu and snappy user, so many apologies if I make mistakes trying to contribute to Ubuntu and snappy, but I want to help so that Ubuntu can be made a better product.

Production machines:
Lenovo ThinkPad T430 - Ubuntu 20.10
Huawei Y6 2018 - Android 8.0.0 "Oreo"
Kindle 5.10.2

Testing machines:
PackardBell imedia S1710 - Ubuntu MATE 19.10 (bug 1522976 renders '3D' DEs on GNU/Linux essentially unusable)

Games consoles:
Nintendo Switch
Nintendo 3DS
GameBoy Advance SP

Broken machines (to be sent to a repair shop when I have the cash!):
Amazon Fire (5th generation) - Fire OS 5.3.6.4 (based on Android 5.1.1 "Lollipop") - battery is knackered and needs replacing
Vankyo Z1 - broken screen (on the inside)
Amazon Fire (5th generation) - broken screen (on the outside)
Lenovo IdeaTab A3000 - broken screen (on the inside)
RM CL51-15 - Broken hard drive

Chucked machines:
Lenovo ThinkPad X201 - Ubuntu 17.04 - broken backlight - screen thus unusable, 'uneconomical to fix', usable with external monitor - parents chucked this
Allwinner A13 - the OS stopped booting, I should've kept it really in the hope that I could've fixed it from the laptop but I did try for a while

Lost machines:
Lenovo ThinkPad T400 - oops

VMs:
Windows 10 (on ThinkPad T430) - for running Microsoft Office