I wouldn't say it necessarily harms Demo's goals, but I think it sort of "harms" the JS community by keeping Node cruft around as a crutch. It's one thing to support Node features when there's no other choice for a package, but then keeping around these Node APIs just encourages developers to keep using them no matter what runtime you are using. By the time that nearly packages support Demo in one way or another, I expect most new packages to still predominantly be written in Node style.

Just my opinion, but I'd rather that not be the case.