I guess it's amusing that I consider myself a lifelong hardcore gamer (not as in amazingly good at it but in playing games a LOT) and I've only heard of 2 of the top 10 (from the two top 5 lists) and would never play any of them.
Must be that I'm old and not surgically attached to a mobile device. I only ever play games on my phone if I'm waiting at the doctor's office or something like that and I play simple games like 1010 or FreeFlow that I can drop and continue 3 months later.
My biggest fear right now is that PC gaming has been thriving when not too long ago PC gaming was "doomed" and consoles were going to crush PC gaming. I feel like Steam was a huge part of helping PC gaming get strong by making buying, managing, and dealing with PC games as easy as it is on consoles. And by making games more visible, especially indie games. The steamworks, workshop, forums, and all other hooks are a thing too. Being able to deal with all your games easily via one app was/is huge for less technically inclined players.
The fear is that all the corporate greed involved, by Valve with taking too much of a cut, which then lead to big companies pushing away and making their own launchers, which is getting worse, is going to fragment the market, negatively impact less technical players, and push people back towards console vs dealing with the hassles of needing a different launcher for every company and no longer having one central hub to deal with the vast majority of games.
Like, I think this Epic launcher/competition with Steam is being misrepresented as a good thing, when the only positive for it is taking less of a cut of some games - which doesn't help players in any way. There won't be any steamworks, or mod support, or anything except having to deal with multiple launchers.