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 find that Bottles is more like just setting up your own wine prefix and keeping it organized. I was a Lutris user for years, but switched to Bottles last year and never looked back.