I don't think Guerrilla sat on a tight budget for this project as Hulst is the head of WWS himself... Let that sink in. But, again, this is a PS4 game that was meant to run only on PS4 and PS4 Pro. I seriously doubt that back in development in 2014~2016 they were thinking "Hm, yeah, we are definitely porting this Sony 1st party game to PC because we want to please Alex from DF", and this has NOTHING to do with them having Decima running on PC. They develop games on PC, but again, their target is the devkit and not a fucking workstation.
They already talked about the animations being locked at 30fps, etc. This is the kind of things you can do when you have a fixed hardware, you are allowed to have things fixed and even make use of some custom hardware inside the console. FFS. It's a PS4 game that was never supposed to run on PC, give them a break. They won't rebuild an entire game for PCMR, they are a Sony studio.