Earlier quoted context omitted.
Semantic whitespace was bad enough, now we have semantic comment blocks? I'm mostly joking, but normally when people say language syntax they mean something outside a comment block.
I am - while awesomely valuing uv - also with the part of the audience wondering/wishing this capability were a language feature .-
uv and other tools would be forced to implement a full Python parser. And since the language changes they would need to update their parser when the language changes.
This approach doesn't have that problem.
Making it a "language feature" has no upside and lots of downside. As the PEP explains.