I still contest that I should be able to solder together a basic computer in my garage and communicate with the internet so long as I follow the communication standards. There is never a reason to outlaw general purpose computing.
A lot of things get deprecated on the internet. You can shout in SSL and nobody will answer back.
Tying any solution to specific companies is the major problem. Because even if the rest of the age verification scheme is well thought out in the user's interest, tying it to Apple and Google not only forces people's dependency on foreign private companies, it also invalidates any pretense of privacy.
