no.

Anyone can get that glitch to work, it works consistently as long as your loading times aren't as slow as on unmodified first gen consoles. It's just that hardly anyone bothers running NG+ categories purely out of no interest. I myself like NG+ but most people just prefer running regular categories.

also edit: feel free to run NG+ categories if you are interested in them, they are fun and like you already said, essentially that idea you had

PS3 is the slowest console, Xebra is the slowest emu. (I love how these are so slow and bad to run on that they are just forgotten almost.)