Yeah Degree's discoveries are certainly interesting. The speedrunning community isn't sure what to make of it yet. There's also some resistance to out of bounds in general, as well as some resistance to the idea of separating the category to OoB and No OoB since the community is pretty small.
Early Roft was already doable, and briefly used to get a Great Sword for when Bowie's promoted, but the Peter grinding in the Elven Town battle makes Bowie's damage contribution far less significant. Now it's considered something to do if you want to do something cool or surprise people less familiar with the game.
https://youtu.be/PcNbpzQ-ei0 (yes, I know the video is bad and I should redo it)
Early Polca skips an absolute ton of exp, and the battle just after Ribble is still needed to get the Power Ring, which is a huge requirement for several of Peter's snipes. Also needed if you want to skip the first Desert battle, where you go to pick up Petro's Grandfather.
https://youtu.be/JkOpcMoW1UsEarly North Parmecia is (obviously) suicidal that early, and crashes with additional followers so it must be done before bringing Oddler with you, which is way too early to deal with North Parmecia. And after he leaves, you have the Caravan.
I'm sure it'll be used for some snipes though. Odd-Eye especially.