My (grumpy) prediction for 2016
I will reaffirm my belief in the principle of Free Software and get all excited about the new GIMP tech preview. Unfortunately I won't initially get a clean compile but after a few hours work I will find out where the bugs are or what I did wrong in the compilation and build process. There may or may not also be some Dependency Hell. Finally GIMP will run in a very impressive manner.
Except for the bit I actually want to use, which will fail with an unintuitive error message when I try and do it. I will search the internet for a solution but the only hits will be other users saying "me too how do I fix this". I will mutter under my breath and go back to whatever I was using on Windows.
Sad but true, been there before on many other products.