They were never a test to evade bots to begim with, most capchas were used to train machine learning algorithms to train the bots on ! Just because it was manual labour google got it done for free , using this bullshit captcha thingy ! We sort of trained bots to read obsucre texts , and kinda did the labour for corps for free !
I heard Captcha was being used as training data for self-driving cars. Which probably explains why almost all of them ask you to identify cars, motorcycles, bridges, traffic lights, crosswalks etc.
I've found that a lot of sites use captchas or captcha-like systems as a means of frustrating users as a way of keeping away certain people that they don't want to access the site (intellectual property owners), though it's not the only tactic that they use. I mean it works, pretty much all of those sites are still up today, despite serving data that's copyrighted by Nintendo, Sony, and other parties.