Probably why TLD requires the first character to be an alpha character. com3 is okay, but 3com is not. Unless it's to protect spec against ignoring that requirement I don't see where confusing could surface.

But then your underlying issue is that you're microhosting and can't hide behind a large cloud provider's domain front, so isn't that inherent to anything you might do?

In other words, blocking solutions that know your small blog is hosted exclusively on 1.2.3.4, without any collateral damage to other blogs the blocking government cares about will just block your IP.

Conversely, if you're hosting importedgoodsecommercesitegovernmentofficialslove.com next to myhumanrightsblog.net on the same IP, ECH is for you and solves your problem: Just register mycoolagnostichosting.net and do ECH to that.

ECH doesn't benefit you if you're connecting directly to one IP. Middleboxes can track that you're connecting to this IP.

ECH prevents tracking through routing layers where your ClientHello might contain foo.example.com or bar.example.com but route via the same IP (Cloudflare). A middlebox can see you are using a cloudflare hosted website, but not know what cloudflare website.

There's no benefit encrypting the SNI with 10.20.30.40 if they can see you're connecting to 10 20.30.40 anyway