I'm using 3.5 with AmiKit on my Windows machine, and 1.3 on my trusty old A1000 (usually 1.3.3).
My A2000 with 3.1 is in storage at the moment, so that is not being used.
I actually like 3.9 the most, but I can't afford it....
Is that confusing enough for keeping within the "classic" OSes?
I too, play music although I am not in a band these days. Used to play Bluegrass and Rock (at different times, of course)