I have nothing against Epic or any other store, but having your library distributed across multiple stores can occasionally present problems. Like if I know I own a game but forget where I bought it, then have to go wandering through them all to find it. Or I forget I own s game and see it on sale and think, score! And now I own multiple copies.
Now you may be saying, first world problems, lol! And ok sure, but it’s still a problem even if a minor one.