Just because a game is old doesn't mean it's not good. A game that's 10 years-old is not even that old for a fighting game, not even 20 years old is that bad.
Even competitively. Marvel vs Capcom 2 is over 20 years old & 3 is the same age as MK9 & are two of the most beloved fighting games in FGC history. When Marvel vs Capcom: Infinite came out in 2017, it flopped in the community by veteran players & spectators alike & since Marvel vs Capcom isn't Mortal Kombat & sell 10m every game regardless how bad it is, it couldn't replenish with enough new players so it died. That's why Ultimate Marvel vs Capcom 3 being included in this years EVO has so many longtime members & fans of the FGC so excited. Look at Super Smash Bros. Melee, it's over 20 years old & there's still major tier tournaments for it & played alongside the 5 year-old Ultimate & still has respectable numbers & payout (Last Major: 493 players, estimated at $7,395 USD pot).