Many devs have done improvements on the codes in the cypherpunk forum. Satoshi named and thanked them.

I think everything points to it being one person, except for the fact that it's astounding that one person alone could've done everything that Satoshi supposedly did on his own. Despite this, I'm still going with individual.

I think it's a plausible theory that there were at least 2 people being Satoshi

Each has plausible deniability! "I am not Satoshi Nakamoto". It's true, of course.

why is so important for you this?