As soon as I read the OP I went in and gave it a try. I think it is an interesting concept and maybe there is something to it. If I ever get a razor that sharp it may come in handy.

I would say that it is for people who are confident in their stropping and have their stroke mastered to the point where they have the razor under complete control throughout the process.

I mean where you can strop correctly without even thinking about what you're doing. Like breathing. Otherwise I think a miscue is possible and then the tragedy of a cut in your beautiful strop.