I have a pixel 4a (yes, ik its eol, i use it more as a backup) that used to be rooted, until i got that shitty battery update, immediately switched to graphene. So yes you do still get updates on rooted

https://en.m.wikipedia.org/wiki/Farmer–Citizen_Movement

The main cast is, yes

You mean the Veritasuim video with linus in it?

Source

Ranger (tui) shows the amount of files in a directory. Im not sure about this but ncdu (also tui) might do this recursivaly.