I kind of totally missed the PS1 launch, but it would have had the advantage that most of the titles being worked on didn't have anywhere else to go, really.
It you're working on a maybe PS5 launch title, you can relatively easily decide to release it for PS4 instead.
Most PS1 titles are tied to a cd-rom, and maybe some of the other hardware, and would have been tough to release elsewhere. Sega CD and 3DO didn't have much traction, TG16-CD and Jag-CD even less, Saturn vs PS1 vs PC was the relevant choice, and I think Sony was better at attracting developers at the time.
Although, it should be pointed out Road Rash was widely ported, launching on 3DO, later releasing on Sega CD, PlayStation, Saturn and PC.
It you're working on a maybe PS5 launch title, you can relatively easily decide to release it for PS4 instead.
Most PS1 titles are tied to a cd-rom, and maybe some of the other hardware, and would have been tough to release elsewhere. Sega CD and 3DO didn't have much traction, TG16-CD and Jag-CD even less, Saturn vs PS1 vs PC was the relevant choice, and I think Sony was better at attracting developers at the time.
Although, it should be pointed out Road Rash was widely ported, launching on 3DO, later releasing on Sega CD, PlayStation, Saturn and PC.