Jon Burton, the founder of Traveller’s Tales states that Ratchet and Clank: Rift Apart's impressive rifts could have been easily made on PlayStation 3.
Back when they revealed Ratchet and Clank : Rift Apart for PlayStation 5, Insomniac Games were adamant that this game could be done only on PlayStation 5, due to the console's custom high-speed SSD, which allowed for all those gorgeous rifts.
It certainly makes sense that PlayStation 5's SSD helped a lot with the intense level switching but tech-savvy gamers knew from the get-go that the "only can be done on PS5" part was just a marketing trick, and nothing more.
Jon Burton, the founder of Traveller's Tales, now TT Games, the developers of many LEGO titles, claims that Ratchet and Clank: Rift Apart rifts could have been easily done on PlayStation 3, a console that was released 15 years ago.
As VGC report, Burton states that developer Insomniac have been "misleading" with their claims that the game would not have been possible without the PlayStation 5 SSD.
He says that these "amazing sequences of Ratchet zipping between many other worlds all chained together into awesome action sequences” are "mostly just cutscenes or very short sections of very limited gameplay".
On the other hand, he also made it clear that he is not claiming that the PlayStation 5 is not using the speed of its SSD for these rendering techniques, only that it's not true that Ratchet and Clank: Rift Apart is not possible on other platforms.