When my food tastes like shit, I don't ask whether it's because they added real shit to it, or just artificial tastes-like-shit flavoring (yes, I've tried them in parallel with cab block; on their own, etc.).
Any actual qualities about the rotaries that you want to specifically describe?
I'm not here as some blind Line 6 defender, but rather genuinely seeking to understand why it's so bad. Not a big rotary user, but for when I might need one down the road....I'd love to know what to look for.