I like the approach of getting away from smartphones and going with multiple dumb devices.
Anki, Qobuz, and Threema are the potential barriers. I guess I can technically use Anki on a laptop, same with Qobuz (since I don't listen to music while travelling anyway). And Threema I don't actually have any friends on and I basically just use it to transfer files between devices.
So I guess all things together I wouldn't even need a cellular-capable laptop ... if not for banking. As a countermeasure against card-skimming I only transfer money onto my card when I'm about to use it.
With regards to Ubuntu Touch. https://grapheneos.social/@GrapheneOS/114662076331894612
GrapheneOS sure is critical of a lot of entities. Recently Firefox, and in the main thread Fairphone. TBH I don't think they're wrong on any of these fronts. Firefox is broadly a mess in terms of organization, Senior Linux Kernel Devs have opposed Rust for reasons so bad even Linus called them out, and the Fairphone I don't know enough about either way.