I have also probably used it on and off for 10+ years, but don't recall any bad updates. What did you encounter that you didn't like if I may ask?

I forget when exactly but somewhere in the 2.x updates they seemingly changed how the default interface's looping settings worked. I mostly use mixxx to make screwed & chopped cuts, vaporwave material, etc. It used to be easier to juggle my loop length live while also jumping between set loop points. Just with a mouse and keyboard. I wanna say I used to install 1.6 or 1.8 to get the defaults I wanted back, but later releases ran better after a while.