I'm one of the lucky ones to have a PS5 and I rarely even turned it on until I picked up the new Ratchet & Clank. As far as I'm concerned, it's one of the only real reasons to own a PS5 at the moment. Thankfully, that might change around the spring when GT7 and other "true next-gen" games hit the shelves.
Even if R&C was technically possible on a PS4 (I'm not technically inclined to argue that), it's just a damn good game and I highly recommend it.