Probably like most people here, I just got more and more fed up with Windows. I tried Ubuntu a few times in the past, but it never really stuck, and at the time Windows wasn’t quite as bad (I quite liked Windows 7 in all honesty). But as time went on with Win10, it kept moving in a direction I didn’t want and I kept trying to customize it to my liking, and an update would just mess a bunch of stuff up and just make the whole experience worst. Recently it started having issues with my multiple monitors, shutdown and sleep/hibernate were basically broken, Bluetooth would randomly stop working, it was just a lot of aggravation.
I’m only a few weeks into my grand Linux adventure, but I’ve got almost all of the functionality that I need from Windows with none of the frustrations, and it’s way faster on top of that. Right now I can’t see myself going back.