I heard it from the Castle Superbeast podcast.

Rogue had you start from scratch with a new character in a random map every time.

Rogue-like games initially meant you start from scratch in a new random world, but you incrementally improve your experience by small buffs you can buy, or changing your starting equipment / skills (sometimes by changing out which character you start as).

Rogue-like has slowly changed to mean "start over regularly but slowly unlock new items/buffs/equipment/characters/etc to help you further explore a world which may or may not be random"

So it applies to games like Risk of Rain (and 2), Balatro, Dead Cells, and Rogue Legacy, just to name a few examples (though 3 of those are 2d platformers with randomly generated worlds if I remember right...).

But yeah it seems to have morphed into a broadly used term for games where you get better over time through purchasing permanent buffs and whatnot (as well as natural skill), but are forced to restart any time you die.

Vampire Survivors and other similar style games have you constantly restarting when you die so I think the term fits as a partial descriptor.

Maybe we could adopt the idle/clicker game term Prestige, but that's more of a voluntary restart when you hit a wall and can't progress, so I don't think it quite works.

Normal bullet hell (Touhou): the enemies shoot a hell of bullets at you. And your job is to avoid it. Reverse bullet hell (Vampire Survivors): you shoot a hell of bullets at the enemies. And your job is to shoot even more, bigger, stronger bullets.

Just like Vampire Survivors!

RPG - Running, Progressively Gaining