

It still likely would have been faster for him to write anything new in a new language. And, there wouldn’t have been anything stopping him from using existing assembly code in conjunction with another language.
I would say his motivation was pretty crazy. One person making a well designed and polished video game is a pretty incredible feat regardless of the language.
An info dump implies its giving too much info at once. Disco Elysium paces its story well, it just doesn’t conform to how you would normally tell a story within a game.