Yeah, I don't know, man. When I went to conquer the Siberian natives, and they all had a tech-appropriate fort (that moved around with them when they migrated. Fancy!), I started to think, huh, maybe there's such a thing as too many forts? As a whole, I'm really not a fan of every OPM having a fort, and everything larger having... just a ton of forts. It's just tedium for the sake of tedium. I get that the intent is to add more strategy and difficulty (... or something) with the change to forts, but it's just silly. Feels like the AI conjures ducats out of thin air for the forts as well. I get that the AI cheats, but that just feels a little too ridiculous and obvious. God knows that if I played Muscovy and decided to build and maintain 20 forts, my economy would be completely busted.
While I realize this is mainly just venting, I can also add my experiences with playing Kongo the other day. By the time I reached Lake Victoria (took like 10 years, there's a mission reward that bridges the uncolonized gap), all of the tribes up there somehow had forts? I mean... what. They make like 0.5 ducats a month, nobody is fooled here (and just to check, none of them start with forts either. Also, they're a tribe in the middle of Africa. I somehow doubt they had medieval European castle-equivalents around every corner, so it's not doing immersion any favors either).