I think pit is Kaizo cubed. Kaizo is is deliberately unfair but can be done savestateless eventually, like IWBTG or the Sans fight, hard Kaizo is a Kaizo version of that with circus performer stunts involving items and enemies and more complicated puzzles, and I think of pit as a Kaizo version of 'hard Kaizo.' The only reason I use 'Kaizo' to refer to platform hell hacks/segments myself (no matter the difficulty) is because I'm just used to it. I don't really want to tho.
Even hard-type Kaizo has more of a following than what we call 'pit.'
--------------------Legacy custom music
How am I so creative? I think taking walks might have something to do with it.
Every single level I will ever make in SMM2 will be easier than Ultra Necrozma.