@dalias I have heard a bit about postmarket os but never really invested much research, thanks for the hint.
what I can read from a first glance doesnt seem promising though. default linux (desktop) distros are not even close to the android (or ios) security model. Atomic is a step forward, but still imho a bit away for widespread use.
i will have to dig deeper what they actually implement, hopefully I will remember this thread ^^