I know it's becoming a bit of pattern where someone posts something negative about Epic and Fenixp jumps to their defense, so just to elaborate: I don't like exclusives. I never liked exclusives. Exclusives suck. The way Epic goes about getting their place on the market sucks and I wish they didn't do that, let alone a whole array of issues the store has (like, y'know, not complying with GDPR and tiny details like that.)
Nonetheless, Mr. Sweeney is entirely correct. Historically, systems which made more sense to develop for (and now I'm not strictly talking about ease of use, throwing bags of money around certainly helps, see) eventually became dominant. I can pretty much guarantee that the people yelling about how Evil epic is and how they're not going to touch their store with a 10 ft pole, while very vocal, are also very much in a minority (see cancellation numbers of Phoenix Point).
The explanation's pretty simple: Your average Joe doesn't care whether he installs Steam or Epic store, what he does care is what his friends have installed so that he can play Fortpex Legenite with them. As long as Epic makes sure that all sequels and variations on Fortpex Legenite is released on Epic store, customers will flood to it. For every unique and ambitious release like Phoenix Point, people will flood to it. For every high-profile release like The Division 2 or Metro Exodus, people will flood to it. And all that'll be then left exclusively using Steam will be the vocal minority, which shareholders/CEOs don't really give a toss about.
The working class will rise and take down the corporate overlords!!1 On behalf our other corporate overlords.
Bit more seriously, I think this just makes it more important to share news like this one so average Joe becomes educated Joe.