Where are you seeing that, on the cloudflare page?
I remember the JS-less version from recaptcha v1 (retired), but I didn't think that v2 supported that. Maybe it's new.
I see that when I open a brand new tor session and a tab with bitcointalk.org while javascript is disabled, not sure what exactly triggers that window. I think it must have been cloudfare. I think sometimes I don't see it. But I definitely saw it the other day when I made this thread and I was able to complete the captcha with no javascript.
It would be great to have this captcha in the login page too. Not only you can do it with no javascript, but it's way faster since you don't need to wait for these damn slow motion fade-in images... im now dreaming with cars and traffic signs.