You are sure an old head, you saw Half-Life 2 bound to Steam once and never forgave it. People don't care that much about Half-Life 2 today, it's not that which is keeping them there. Meanwhile today Epic not only makes their in-house games exclusive but games from other publishers as well.

The gaming market is much more fickle than general computing, one generation Sony might be on top, and the next one is Microsoft or Nintendo.

Sure people don't want multiple game launchers, but a launcher that has their favorite game and does all that they need would be enough to get people to switch over. Epic got Fortnite and loads of players because of it. If their launcher did all that players wanted it to, maybe more people would make it their main platform. But Epic doesn't care to add features to it. If I want to read guides, or listen to game soundtracks, or mod games, I can do that without leaving Steam. But other than exclusivity, you know, the thing that you denounce Valve for having done, there is nothing that Epic does better than Steam or any other store on the market.