When you log onto a service, make a purchase, or do something else on the web, you have a decent chance of running into a CAPTCHA. Everyone knows what they look like, and it can be incredibly obnoxious: “Select all the buses. Click on bikes. Does this photo have traffic lights?” CAPTCHAs do not even work all the time, leading to even more

Source: Hot Hardware – Cloudflare Working To Replace CAPTCHAs That Waste Time And Cause Frustration