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
Even indie games take years and years, although it makes more sense for them. Silksong still has no release date right?
UFO 50 was announced in 2017.
I mean, if I were to start my dream game tomorrow, it would take a while since I'd also have a job. Plenty of indie games are like that
Talking more about the ones that aren't side-projects.