I have been an aros user for sometime. For me, its not about x86 verses powerpc, but then again maybe it is sometimes.
For example, I can pick a 1-2ghz computer out of the trash, add an sblive, (15$), an fx550 or 650 video card (15$) and then run aros on it. The performance on even a 1ghz computer is definitly as good or better than any 700mhz power pc computer that costs about 1,000$ with amiga os4. 30$ verses 1000$ is quite a big difference.
There is also something I prefer about AROS- Its open. If you prefer amiga os4 or morphos thats fine, but don't trash aros and the people working to better it. AROS can never die, is not controlled by any one individual and
the community is really great. Just because you call it amiga os dosn't mean computers running it are the "real amiga" there is no such thing anymore...
Steven