I mean. Disco Elysium is only an RPG in the sense that you get to choose which version of Harry you play. It's not a blank slate situation where you can be whatever you want, you're always just Harry. And it is barely even a game, at the end of the day. It's a novel pretending to be a game.

In terms of RPG design, though, the one thing it truly did put into the forefront was the "fail-forward" ideas present in many interactions, which is something more games should take inspiration from.

Making failure interesting makes the story much more engaging regardless of your choices and your luck by discouraging save scumming and instead letting you feel good about rolling with whatever outcome happens.