If people didn't care, they would indeed leave. If people come back to look around, they do care. AH has much going for it, but needs a lot more love than it gets ATM. Servers and number is a red herring. That the same 20 people turns up on one single server every other night means nothing. Only a few percent of DCS players are online at all, but every AH player is online. The same for IL-2. This weekend there will be a virtual online aerobatic championship in DCS with 56 of the best teams.
The truth is that WWII fighters suck in DCS. Grossly overcomplicated and with a FM that is a complete joke. I can't for the life of me understand why anyone would fly them. The only reason I can think of is they don't know any better. They are excellent in IL-2 and on the simplistic side in AH. Then there is War Thunder ... Lots and lots of people like War Thunder for some odd reason, but there you go.
There are lots of cool stuff in this virtual world of hours. Only a fool would stick to only one piece of software, is my opinion.