I agree, but patching and many other parts of that proposal are.

Like the date picker is still garbage all these years later and folks ship massive JS libraries for date range picking. :(

I'm not convinced that this makes sense in the platform. JS is good, and small frameworks and fast pages are totally possible. There's a reason primitives have a longer shelf life and wider adoption than thick platform level things.

Compression? I wish that was built in though like progress events. The only other reason is uploading very large files where you don't want it in memory. For example if I'm downloading a video stream and uploading it to a file elsewhere.

I would be curious how the performance compares to WebKit though. I was constantly pushing back on all this magic analytics code in hot DOM paths.