[magicalhippo]

This[1] study suggests image framerate does not significantly affect our ability to perform predicted moves accurately in time, above a certain minimum which is lower than 24 Hz.

Moving the mouse and then pressing a button, or pressing one key and then another, are both cases of predictive moves.

So it seems one shouldn't rely on framerate when talking about the limits of sensing input lag, at least in general.

[1]: https://jov.arvojournals.org/article.aspx?articleid=2213289