Fighting games won't thrive without networking, beit at arcades, tournaments, or online social networks.
Games are usually imbalanced and tiered trash with new meters and gimmicks slapped on. Marvel 2 was a lightning strike, where the gimmicky tiered trash heap was so overwhelming and complex that a scene formed up around it trying to figure out and salvage a meta-game from it. Similar in being unconventional and fucked up to Smash, which Nintendo had no real idea what to do with as the fans took it and ran with it themselves.
The downfall of any fighting game is gated off player base. Everything needs to be cross platform compatible. Even freebie sales models aren't helping a lot of games take off. None of these games are platform selling flagship killer apps anymore.
Sega is dead since arcades went dead, Crapcom is experimenting and remastering old shit, SNK shat forth COTW into the universe and caused unmeasurable suffering. Half of the organized FGC scenes are full of e-sports shitheads with small dick energy, trying to chase sponsorships.
Nothing will completely fall apart, nothing will improve either. Sales will go up on Mortal Kombat and sales will never be significant for any Guilty Gear/BB entry, easily overshadowed by licensed weeaboo pandering trash like DBZ, Naruto, OnePiece
Virtua Fighter has been dialed in to give us a quarter century of universally balanced design, near perfection, and it's slowly being broken by janky RGG remakes nerfing things. Nobody ever gave a shit about it outside of Japan anyway, and it needs Discord to survive.
TL;DR: Buy me Bonestorm or go to hell!