I’ll never get over the hypocrisy of people loving steam and its exclusives while hating EGS and its exclusives. I’ve never seen an almost purely tech-focused crowd pull so hard for a monopoly before.
Yeah, I can't think of any explicitly Steam-exclusive games off the top of my head, other than maybe Valve's own titles.
Given Steam's history and market position, they don't need exclusives at this point. I do remember the likes of Outer Wilds and Final Fantasy 7 Remake being EGS exclusives for the first year of their respective PC releases.
To the second line, systems with a network effect tend to clump people together.