the only platforms I've ever heard of this for were Windows Phone and the Epic Store
both of which were runaway commercial successes
Besides, if this does end up putting pressure on the developers to start supporting more platforms than just Microsoft’s data collector ahem I mean, Windows, then I’m all up for it. It’s a win for everyone.
These days the only context I hear "Playstation exclusive" in comes from people trying to analyze how much money Sony lost developing Concord.
iOS and Android less so (even if there is a one time charge for Android and a yearly charge on Apple). OTOH I have not heard of them usually reaching out to more than a handful of devs for promotion purposes.
The one time model from Apple/Android really is just a tax that gets you nothing but access in comparison. It's a full advert model where the biggest players throw millions at Apple/Android for visibility.
Valve's somewhere in the middle of the two. No "p2w" adverts but it's not doing too much to draw devs (except reducing the tax for AAA devs). It doesn't need to. A lot of its community models are "we're having a party, you bring the food and drinks".
Astro Bot is a personal favorite too. That one would be tricky to get the true experience on in terms of PC platform.
Otherwise, I can't remember the last time they funded a game they didn't make themselves. Maybe in the very early Steam days, but that's long past.
Neither one of them is a system-seller though. I don't think anyone feels FOMO because they missed the Day 1 release of Gran Turismo, or didn't play Astro Bot with 7.1 Surround and HD haptics. Bloodborne was a magnum opus, Persona 5 had people lining up outside Best Buy to reserve a copy. The PS5 exclusive library is down right impoverished by comparison, to say nothing of the PC exclusives it lacks.
All those true "seller" series were always 3rd party and they've all pretty much abandoned console deals mid Gen 8. Bloodborne was truly the lasst of its kind.
The real "system seller" for the ps5 is a bunch of Japanese games that will never really be on Xbox and can't run on switch. So that depends on your taste. Japan's mostly come around on PC though, so it's not truly "exclusive" outside of the shaky optimization.