Been using it for years and watching others’ machines for how tracked they are across the web is terrifying. Even things as basic as being on clothingshop.com and then seeing ads for said shop on someotherdomain.com, which I understand is totally normal, has become jarring for me. I recommend everyone installs it. Yes, you have to click more cookie banners, and I still say no, but mind less when I cave and say yes because what they’ll learn is so limited. My temporary containers have a persistent auto increment so after a few years it’s (semi-) interesting to see that I’m on my ~20,000th temporary container
It is my understanding that the name "cookie banner" is misleading, to the point of acting against your own interests.
If you click Agree you agree to be tracked regardless of the method. So yes, cookies won't do much, but now you've agreed to any kind of tracking, even those that defeat private mode and/or script blockers (assuming there's one).