I was thinking about this question last night and I think the answer is - or maybe a better way to put that is "the answer that I would give is:"
It's the same ethos as five years ago, or ten, but operating on different individuals. It remains one of the premiere technical shooting forums on the internet, and retains a large number of successful shooters, which inadvertently results in a broad depth of knowledge because you can't get good at shooting without two things: money, and the drive to push yourself. Anyone who has those two things is going to go pretty far in life, so the membership here is going to be people who are above average in a lot of measurable ways.
But since it's also a place for learning, there's always going to be a bit of a cycle in which people essentially graduate and lose interest in their former studies because now they don't really NEED to learn new things as much...if they're still in the shooting game, they may well have advanced to the point that more classes or more research or whatever aren't very useful compared to just going and implementing all of the stuff they've already learned.
What I find interesting about that is that ordinarily I expect forums to follow this life cycle:
1) bunch of people REALLY into something start a place to talk about it and get better at it etc
2) word gets out that's the place to go for high level information
3) place slowly becomes bigger and dumber, and the people who are REALLY into the original concept leave and start somewhere new
4) word gets out that's the new place to go
5) profit
But PFC has basically avoided this cycle. Some good people have left, but the place hasn't really gotten bigger and dumber, it's just a slightly different cast of characters on the same upward journey.
The only change is that personally I find the place more relaxed now. I would have been a LOT more hesitant to horse around about drug use and other goofball stuff here ten years ago...although I think I did write about Burning Man here in 2014. But I was a lot more guarded about what I said than I would be today, when all bets are off and I might blurt out anything at all if you catch me in the right mood.