Seems a little over the top. The AP will consume additional power. Just restricting Internet access via router should be way easier.

Maybe connect it to WiFi, but instantly block Internet Access? Maybe it even has useful local networking features? (OK, most likely not)

Thanks. Sounds complicated. Not sure I want to invest anymore time in UT anyway. If I just could have dual boot via SD…

I thought Debian Testing was basically rolling? Most of the packages at least Btw: Tumbleweed has been rock solid for me over years.