I think it's clear that playstation needs to acquire more studios and open itself back up to having AA projects again to avoid long dry spells.
AA projects don’t take less time to make. Even small indie games take 5+ years to make. Most of the time spent on making games is in R&D and pre-development planning.
I can’t think of one AA title that was made in 2-3 years. Look at things like Hades and HollowKnight…still no where to be found