[motge]

If no content blocker like µBlock is used, Google will probably find out about the website visit through Google Analytics. But the important difference is that Analytics is not essential for visiting a website while the CAPTCHA from the CloudFlare page in front of the website is.

But the change is especially good for Tor users as they are often blocked from using Google reCAPTCHA (due to "suspicious" activity from the network) at all.

Finally I hope more companies follow the lead of CloudFlare and change some parts of their services to not solely use Google so that the web becomes more diverse again.