They start making games every couple of years and we will have another assassin's creed on our hands. Pretty much dead franchise. Also fighting games are different from any other genre. Nowadays fighting games have really long longevity thanks to tournaments and pro players.
So if studios started pumping fighting games left and right it would make it hard for pro players to adjust, because they would have to keep adjusting to new mechanics and changes, and if studios kept mechanics same, then it would piss off a lot of people, because studio would keep charging 60 bucks every 2 years for the same game. Which is bullshit.
Aaaand. Street fighter might have less installments, but please remind me, who is a reigning f%^king king of fighting games? Which game was one if not the main attraction in EVO all these years? Oh yeah. Street fighter.
Street fighter 2 is still being played in tournaments. There is a reason. Quality over quantity. I prefer that. Yeah. SF5 launch was weak as hell. But SF4 had a pretty weak start as well (well... not as bad as SF5, but still) and look at it. Fully fleshed out game. Which was popular for years. Cause it smells of quality.
I mean yeah. If you want, you can preach that about MK. But keep SF out of this shit. I want a game which is properly polished and there is enough time invested in it. Not some cheap shit, which gets pushed out every 2 years, only for you not to be able to play it for 6 months. Like MKX.