AI is already fully capable of solving the majority of/all captchas, you just aren't supposed to do it due to TOS.
I expect with time these kinds of things will change.
If TOS is the main concern, then surly a “Are you over 18? Yes/No” style page should be enough.
If TOS is the main concern, then surly a “Are you over 18? Yes/No” style page should be enough.