+1
In preferences, we can set which plane the grid is on: xy, xz, yz, and also it's cell size and unit, etc.
But for sure, it'd be nice to be able to toggle the other two planes on and off too.
Or perhaps a key to switch planes, such that it would cycle between xy, xz and yz. Perhaps momentarily flashing up the plane the grid is now on, or including it in the Info, when the grid is on?