@jjrhodes said :
After reading about the PS4/PS3 controller problems (which I use) here: https://retropie.org.uk/forum/topic/17650/dualshock-controllers-on-4-4-with-3b ,I think I'll wait to upgrade for awhile.
The topic you mentioned describes the changes in controller support in the new Linux kernel, but it doesn't mean they won't work. The button mappings have been changed, but since you'll be starting from scratch (new installation) you'll have to configure them anyway on the 1st boot. The trouble it seems to be when you have more than 1 such controllers and you're using one of the non-Libretro emulators (Mupen64, advmame).
Note that the changes in the controller behavior are triggered by the new Linux kernel driver (sony-hid), so there's not much that the project can do about it in the future.
IMHO, you should give it a try - backing up your existing image with Win32DiskImager or Ether, so you can restore it if you don't like the new version - and get the 4.4 RetroPie image, update it (OS included) and see for yourself.