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.
I like to use steam and heroic for all the games i bought that have drm. Bottles is my nextstop for all the non legit content,since its all sandboxed i can feel safe running content from source that arent safe.