[stcredzero]

Surely, there is some context where WD-40 is just fine.

I do note that lubrication is actually complex. Soap feels plenty slick in general, but if I try to shave with it, certain soaps give very poor results. So, of course, not everything slick and oily is going to work for lubricating machines.

But when I rub soap on wood screws, it works just fine in that context!