I have mostly been playing indie games. I find as a get older, triple A titles don't really appeal to me anymore. I sometime wonder if its possible to make a living developing a procedural generated rogue like on steam.
8,243 games were released on Steam in 2019 and 3,434 so far in 2020.
Unless you approach indie development like a business and you have a concrete plan for gaining a following, your chances of making a living are near zero. That's not to say you shouldn't do it, but don't expect to make a living doing so.
As an example, David Brevik (of Diablo and Diablo2 fame) spent several years working on It Lurks Below -- a procedurally generated roguelite/dungeon-crawler. According to SteamSpy [1], he's sold 20k-50k copies at around $15-20 per copy, and as of today the game only has about 20 peak daily players.
So probably $500k-$1M in gross sales (and then Steam takes 30%) for someone of his caliber and reputation, after 3+ years in development and a year or so since initial sales. It's just an unbelievably difficult chance of making it financially viable.
However, if you can do the above for every game you make, and build a following, then yes, it's possible. You'll need the support of a partner, a low-cost living location, or a job that doesn't kill the enthusiasm you have for developing a game.