For a short period, yes probably. But Bethesda is a failing studio and so is Ubisoft. EA has popular sports games but I’d guess that’s a very small portion of PC sales considering those games do poorly on the platform compared to consoles. Epic does have loads of money but not enough to float the other companies.

In my view, Microsoft and their GamePass stuff is the only real competitor that will ever take a small dent out of steams sales, mostly because of the Call of Duty titles being on there now. But in order to take 0.05% or whatever of their sales they had to: own the OS for almost every computer running steam, buy dozens of game studios, compete (and lose) in the physical console market over decades, and they had to buy not one but two of the largest studios out there. To the point where they own a significant portion of the iOS App Store that is orders of magnitude more money than PC games and still they cannot compete with steam on their own operating system.

If that doesn’t spell out how unstoppable Steam is, I don’t know what will. The thing that might actually hurt Steam is if those publishers were all GamePass exclusives. Even then, Steam would be just fine I think. Crazy.