I'm a retro gamer, with 6 different old school consoles. Initially, I wasn't going to buy into the "next generation" at all. When I got my Xbox One two years ago, I was tight on cash, and bought a refurbished system, because it was cheaper than buying a gaming rig (my first plan) and I wanted to play Killer Instinct.
Fast forward to now, and everbody's on PS4. Tourney standard is PS4. And "What's an Xbox?" and yadda, yadda yadda...
You know what? You're damned if you do or don't. No platform is going to allow you to play everything when you want to play it. It's true that generally, PS4 is what to buy if you want to play fighting games, but you will miss out on good games elsewhere.
Everyone can't buy everything and probably shouldn't anyway. If you're on PC and you don't want to spend a bunch of money for ONE friggin console game, I don't blame you at all.