this is pretty significant!
ever since smash bros brawl, there has been a 1 frame physics delay that nobody has figured out how to get rid of. this results to the game feeling a little bit laggy to some people who are used to something like melee or 64.
HDR, the "melee-like" mod for ultimate, has now managed to REMOVE that physics delay in the newest nightly build. over a decade later, this problem has finally been solved!