The market's moved elsewhere, developing a triple-A game of any genre takes roughly the same amount of effort, however strategy has a small overall market share compared to FPS, RPG, mobile, etc. FPS games might have around an 8x larger market, but don't take 8x as much effort to build, so that's what gets approved.

https://www.statista.com/statistics/189592/breakdown-of-us-v...

Couple that with studios (or publishers...) often preferring to re-skin their existing IP and you get Call of Modern Warfare XVII: Rehash Edition, or Skyrim for your Smart Fridge.