I'm glad the adb flag is still an option, I had to use it to install the app for my ebike wheel which is the only way to adjust the assist level / Regen brake strength. Maybe eventually I'll try rewriting the app but I just don't have time.

What's next?
So far this is how I view all the updates done:
Last good version of Android: 7
Last acceptable version of Android: 13

Linux mobile distributions are probably not yet fully usable and I don't see another alternative. Perhaps it will get better than Android and iOS just due to them getting worse. I wish Nokia kept it going with phones like N900.