No overhead? Wrong. So very wrong. Removing it is the first step towards not having to support it ("support" including coding security and bug fixes). Support is a whole lotta overhead. No offense, but you're clearly out of your subject area here.
You're just changing the subject; this is about people incorrectly thinking that Rosetta somehow slows their computer down or something. I suspect this is mostly about licensing fees, since Rosetta wasn't developed by Apple.
--Eric