Understood. I thought you were referring to East San Bernardino Peak, with which I am either not familiar or is lost to my memory cells. I am very familiar with the long switchback above Limber Pine Bench, and it certainly would not take much snow to cover it.
Route-finding in snow is certainly often a problem, though less so today with GPS. I can see that a few cairns could be helpful. But they could also be covered by the next storm. And they suffer from the same problem as following other people’s tracks in snow: who laid them, where were they going, did they know where they were going?