only ads on big sites or ads by big providers are blocked. cookie prompts and other annoyances much less, because there is a great variety of them. data mining and hardware fingerprinting cannot even be thwarted anymore.

sure, if you only care about ads, but not at all about your privacy, it does not mean much to you. personally I would rather see ads (topic based) than give up my privacy, and the complete uBlock Origin is very useful for privacy too.

Now I’m curious how anyone could possibly have a non obvious definition of ad blocker efficiency.