Source?
Even if you have one though, when everybody else tells you one thing but your brain latches on to the first piece of information you find that supports your claim and dismiss everything else, well, I think they call that cognitive bias. Are you even aware you’re doing it?
The only place you should be looking for Era population information at this point is here:
https://ironforge.pro/population/era/?locale=US
The only conclusion that you can accurately drop from this is that there are at least 7200 Era characters on US servers that are raiding (participating in logged raids).
For a guy who doesn’t play on Era, you sure spend a lot of time talking about it. It’s ok man, you can just roll a character.