Definitely wouldn't want a dumbphone. Rather the opposite, like a super-smartphone, something like Raspberry Pi inside my pocket (PinePhone may be getting there).
This post got me to try installing Jellyfin server in Termux under proot, only to realize it's fairly useless for random videos and then wipe it 5 minutes later, but anyway that's the kind of things I do/want to do with my phone.
And hell, I'd definitely want a keyboard attachment like the PinePhone has.