Nothing more disappointing to me than seeing a game I might enjoy... and then it's only available on PC on Epic Games store. Why can't it be available on Epic, Xbox game store and Steam? It's so annoying, like you have no choice but to use Epic... which I would literally do ANYTHING not to use.
If the list on PCGamingWiki is up to date, there aren't many Epic exclusives anymore (only 26 currently): https://www.pcgamingwiki.com/wiki/List_of_games_exclusive_to_Epic_Games_Store
And, earlier this year, Tim Sweeney said that many of exclusivity deals weren't a good investment while the free games have been "magical."
So, it seems like a problem that is solving itself over time. Epic will probably still have exclusives going forward, but I would expect them to target a few high-value exclusives like they got with Alan Wake 2. Or, maybe they will just do more acquisitions of games to self-publish, like they did with Rocket League and Fall Guys.