I've been using Ubuntu Mate 16.04 because I prefer the classic user interface (UI). I didn't like the Unity UI or GUI which Ubuntu began using since Ubuntu 10.10 which came out in October of 2010 (2010/10 = Ubuntu 10.10). But I may consider trying out Ubuntu 20.04 in April of 2020. I may try out other operating systems as well. But for the last several years, I've focused on Ubuntu Mate. But I try to keep an open mind concerning the different OSes, programs, etc.

Passwords

Depends on which passwords, which keys, were discovered or guessed by the criminals, the hackers, or whoever. I guess it depends on how as well. See, if you change your password, it may not matter too much as that may not necessarily stop them from getting the new password. I guess it depends on the details.