Seems like every week over on GamingOnLinux there’s an announcement of a new launcher.
Personally I only use Steam & Lutris. Lutris for my gog games and BattleNet, Steam for everything else.
I don’t know of a good reason to use Heroic, or any of the other new ones over Lutris / Steam, but maybe I’m missing out.
Steam for most games. GDLauncher or ATLauncher for Minecraft (I have both installed, mostly use GDLauncher though), and my emulators are installed separately and I just launch them from my dock.