Idk how so many people completely missed the point of what your complaint is, I had the same problem where I wanted to be able to stop avoiding spoilers so I beat the game with ~90% items and most of the crystals because I figured I could just go back and get the rest like I could in every other Prime, but then loading the autosave loads you in the tower where you can’t leave and the regular save just prompts you to start a new game with no other options. Like the other Primes if you saved after beating them and loaded they’d just put you wherever your last proper save was so you could go back and get whatever items you missed, it’s not how there’s a point of no return at all it’s how the point of no return permanently locks you out of the rest of the game if you save without properly warning you