KDE Plasma is genuinely good

Kubuntu is a drop-in replacement for Windows 10

My answer to this is yes.

I’m an AI Developer and my only option was to self host because I didn’t want my training data leaking out onto the web and by extension, China and the rest (I trained on my own data, writing, and notes, along with Wikipedia).

Self-hosting gives you complete freedom but also as one other user cautioned, don’t fall down the well/rabbit hole.