I did just that when I first switched to Linux, I installed KDE Neon on Linux Mint. And it broke everything. And when I went to forums to ask for help everyone yelled at me. So maybe don’t recommend installing KDE on Linux Mint.

Right, so Ubuntu

Huh, Linux uses GPLv2? Does anyone have any info about why?

Edit: Found a video https://youtu.be/PaKIZ7gJlRU. Makes sense. Complete freedom to use and modify the software means freedom to use the software in a proprietary device with DRM, as long as you still give the changes to the public.