> ECH is a good idea on paper but will never work in the real world.

Uhuh.

> Oppressive regimes just drop any connection lacking a plain text SNI.

All of the connections will have a plain text SNI. Many of them will have ECH. In some of them, at least at first the ECH will just be GREASE, in others it's real. For the server it's apparent which is which, for a snoop it's impossible to know. Indeed that's sort of the point of GREASE.

> They don't give a shit about blocking large legitimate sites or breaking connectivity for large swaths of users if it helps them avoid losing power.

We heard basically the same thing for TLS 1.3. But of course we actually rolled out TLS 1.3 with no major problems, even the anti-downgrade provision which was the part I was most sceptical about delivering. Google's Chrome GREASEs a bunch of TLS 1.3 already.