I agree, engineering is all a series of tradeoffs, and tradeoffs can go one way or the other.

That said, I have yet to see anyone ever say "Oh man, this programming/configuration/data transfer language would be so great, but I wish they hadn't supported comments!" I see the opposite about JSON all the time.

And I don't see this about other features, e.g. Go specifically decided not to support the ternary operator, and while some folks may like that feature, I think more folks really appreciate that with Go there is generally a "standard" way to do things and it doesn't give you a million different ways to essentially do the same thing.