Very sad. I use http/2 push on my website to push the CSS if there’s no same-origin referrer. It saves a full roundtrip which can be pretty significant on high latency connections. The html+css is less than 14kb so it can all be sent on the first roundtrip as it’s generally within TCP’s initial congestion window of about 10*1400.

The only other alternative is to send the CSS inline, but that doesn’t work as well for caching for future page loads.

103 Early Hints is not nearly as useful as it doesn’t actually save a round trip. It only works around long request processing time on the server. Also, most web frameworks will have a very hard time supporting early hints, because it doesn’t fit in the normal request->response cycle, so I doubt it’s going get much adoption.

Also it would be nice to be able to somehow push 30x redirects to avoid more round trips.