In Gnome 3, I cannot tell the file manager I want to open .mmp and .mmpz files with lmms (Linux Muitimedia Studio.) So far, I haven't found a single person who is enthusiastic about Gnome 3 that can tell me how to fix this.
I think later versions of Windows are prone to the same stupid limitations on user manipulation of filetype choices, but that doesn't impress me either.
That's just one example. If Gnome 3 developers don't fix this particular thing, and won't pay attention to other legitimate complaints, I won't use Gnome 3. Period.
How is this supposed to make me suffer, when I can just as easily use Mate, which doesn't have these issues?