[detaro]

From what I've seen, speedrunning communities tend to be pragmatic about that: If something like this becomes a concern, the leaderboards are typically just split and a new category added. (Although I guess for a console game there is a fundamental question if keyboard is an extra category or gets allowed for the "main" one)

For some games there are tons of categories for different variations or restrictions. (It can even happen that when a new fundamental glitch is found, a category "Game X without this one specific glitch" is added if people enjoy running the game without it anyways)