Death Stranding came out in 2019. Death Stranding 2 will come out in 2025. That's six years for two games. If these were the PS2 days Kojima would have cranked out 3 Death Stranding games by now and we'd be getting Death Stranding 3: Subsistence along with a teaser for Death Stranding 4 next year.
Remember when video game trilogies used be to a huge thing in the sixth and seventh generations? You'd typically get 3 games in about 5-7 years
See: Halo, Gears of War, Resistance, Killzone, etc
FF7 Rebirth PC when?
I think a lot of it isn't due to developers as much as it is bonehead executive speculation plays. There also wasn't chasing the live service dragon.
How many Yakuzas have we had? https://en.wikipedia.org/wiki/Yakuza_(franchise)
Someones doing something right over there.