And gamers have 100 times more options to inform themselves about bugs and if a game is worth it, also worth its planned already locked away add-ons.
10 times cost does not mean anyone must think it has to be feel 10x more worth for them.
Previously you got a complete product, at the early days with a very limited set of characters, now especially with fighters you get sometimes a similarly barebones experience but many characters from sequel 3, 4, 5 whatever, are now locked away.
It's a struggle for them, of course, but the market will work it out. There is probably not enough room for VF, Tekken, SF, MK, SC, KI, DoA, KoF, Inbirth exe abcdef whatever, Darkstalkers, Guilty Gear, Smash Bros... and all the games that already died in the SNES days. Very much like racing games, there should just be one release per series per gen, and you build every upgrade and expansion, free or payed, onto that. Numbering sequels make zero sense for such games. And some among the known IPs will not survive when their costs are climbing too high, so probably the 3D variants are most at risk, while cheaper old skool animated stuff can continue its existence in a small niche quite comfortably.