100%. Web Credentials + Digital ID + age verification will all be handled with Secure Attestation backing it. Cloudflare will have a checkbox for site admins... [X] Require Age Verification... and that's it. Boom. Your site is "safe" from accidentally allowing kids in.

...of course, free speech and anonymity die with this, but why would that be a problem? You don't want to say anything the current or potential future government wouldn't like, do you?

Free speech doesn't die with this. Host your own site.