Comment by btown

Do we know if this is immediately going to slot in wherever reCAPTCHA is currently used / is there a rollout plan? Or will site operators manually opt into the new system? Is there even a way to opt out?

I can think of many sites where, for users that trigger captchas often, introducing a multi-device workflow is even worse for those users than clicking traffic light images. An automatic rollout would be hostile to those operators!