The truth is that no matter how many nicknames you go by, there is a strong chance google knows anyway and therefore i treat the internet as such. By now there simply are to many markers to not be able to do this. (still guessing though)
In a not so distant world, i also see AI analysing comments and matching similar people to the point where they will be able to say "welp, these are the same people" too. Especially when i already can tell ChaptGPT to read like shakespear.
This, combined with the fact that i do use my real name with my accounts, just makes me very picky where i sign up. Places like reddit work wonderfully without accounts too.