https://www.gamespot.com/articles/ps4-555-update-is-out-now-and-it-doesnt-do-much/1100-6459047/ > A new PlayStation 4 update has landed--but it's not the type that adds new features or functionality. Version 5.55, which is mandatory, "improves system performance" in unspecified ways, according to the official patch notes posted by Sony on its website. > "This system software update improves system performance," reads the one-line patch notes.