I agree!
Like for example:
1 Amiga forum (covering HW, SW, OS for 68k/3.x, PPC, AROS, MorphOS and OS4)
1 General computing forum, for discussions about all other platforms
1 General forum, for discussions about anything at all.
1 Buy&Sell forum
1 Site Suggestion and Announcements forum
Strongly disagree with the idea of a single Amiga forum. I don't think it makes sense to mix questions about fixing old hardware, with opinions of games, with questions about music & video production, with C=USA bashing, etc.