That leaving trails feature was more designed for very old school LCDs with extremely slow refresh time,

It’s true that there was an type of early LCDs that had very slow response rates and that that produced a visual artifact, a visible trail behind the pointer (as well as ghosting behind anything moving). I’ve used those displays. But that’s not what I’m talking about. There was also software that explicitly drew pointer trails to make the pointer more visible.

searches

This kind of stuff.