Before I found the extension on HN a few months ago, I hated recaptcha. Every site using cloudflare was pain in the ass.
Not only does it make 1-click validations possible, it slashes the number of recaptcha requests (for me).
It's only failed me once. Google said I was using automates captcha solvers. Went offline for a while and voila.
I believe I have pretty good tracking protection and it's been working fine for me.
The long-term goal is to sample the user's behavior and maintain an offline model for mouse movements and keyboard navigation. Highlighting likely matches in the visual challenge should also be possible to aid people with disabilities, when they are blocked from accessing the audio challenge .
Neither can blind people. I think there would be legal repercussions (in the US at least) if Google effectively walled off the internet to visually impaired people.