To get a basically locked 60 FPS game in the areas where even the PC version, on good PC’s, got in the 10-15 FPS, it means that the engine was reviewed quite in depth and/or replaced to ensure it does not drop even in worst case scenarios (meaning that in other areas the game unlocked could run well above 60 FPS).
Crash Bandicoot remaster was a very good deal, but it was a much older and simpler game to port by comparison (static camera, linear paths, and a much greater power difference between consoles). Was it a better deal than this? Possibly so, but it does not make $39 for the Xbox One/PS4 version robbery.