https://blog.cloudflare.com/announcing-encrypted-client-hell...

Yes that's why I listed a couple reasons why adopting ECH everywhere is not straightforwardly all good. The network operator one in particular is I think quite important. It happens that the same company with the largest pushes for "privacy" (Google) has also been constantly making it more difficult to make traffic transparent to the actual device owner (e.g. making it so you can't just drop a CA onto your phone and have all apps trust it). Things like DoH, ECH, and ubiquitous TLS (with half the web making an opaque connection to the same Cloudflare IPs) then become weaponized against device owners.

AFAIK it's still not that widely adopted or can be easily blocked/disabled on a network though.

That sounds like an Android issue, not a TLS issue. If I need to break TLS I can add my own CA. Not having TLS is not the solution. Google will find other ways to take control from you.