Captchas are pretty cheap to solve ($0.002 per solve) so I'm actually surprised there isn't some sort of captcha solving browser plugin aimed at consumers. Spending a few bucks per year to ensure I never have to solve a captcha seems like a bargain to me.
It exists for abusers trying to break into accounts with automated tools. And yes, it’s very cheap and basically is a measure that generates a lot of friction but easy to bypass.
The Cloudflare proposal is great for the bots. Just build rigs with FIDO and Webauthn keys. At scale (large wholesale orders) you can get them for less than $3 from manufacturers like Fetian etc…
It's one identity per computer, not one identity per FIDO key. But anyway it defeats the purpose of checking for humanity.
You can’t check for humanity bots can solve all capcha.