I agree with the new guy. The polymorphism :-D is itself a representation of the 'platform' as a whole. 'Amiga' has never taken a single road; it's always tried to do 'what's better,' whatever 'better' that particular day is.
That's part of the spirit. It's also what's made it so g-dawfully hard to actually produce a product out of the mess.
Now, as long as they don't break logotype among individual product lines, I think I'm willing to weather the diversity.
4.0 itself is a special case, given the reliance on the contributions set for backgrounds... Yes, that dilutes the branding -- none of the most eye-popping designs follow the One True Logotype -- but it's also a celebration. It's 4, it's 'finally here' -- or so we'll say when it ever hits shelves :-P -- it's still somewhat 'believer-targeted' at this point, so collateral damage from the lack of an Apple-strength brand-of-the-week is minimized, and the whole thing becomes a representation of... As James Earl Jones (or whoever's doing the voiceovers for the UPS ads) might say, "What does 'boing' mean to you?"