Well OK, I did an unscientific test with a “stainless steel” dinner fork… the magnet sticks, now there may be other type of stainless steel that are not attracted to a magnet but the average consumer grade stainless will be attracted to a magnet. The Wapi is attracted to the magnet just like my “stainless” dinner fork.

Did a bit of research. It seems Stainless Steel with high Nickel content is not magnetic and not hardenable. Nickle changes the magnetic properties of the steel...
Stainless steel with high Carbon content, and low or no Nickel content is hardenable and is magnetic… sounds like the magnetic stainless is the one for razors.

Now anyone reading this thread and want to try this magnet trick on any razor... PLEASE be careful, if the magnet is strong enough (like those Neodymium magnets found in computer hard drives) will grab the blade from your grip with such a force… when the blade hits that magnet… And if you turn the spine to the magnet, once the spine touches the blade, you make the mistake and relax your grip... but it will attract the thin side and roll the blade so quickly slamming the edge onto the magnet and snap the blade… It happened to me…. Use a small magnet or a useless blade.

I think stainless steel can have different Chromium content. The higher the Chrome content, the better the stain resistance but, the softer the steel.
It is possible the steel in the Wapi has above average Chrome content... but as we all know, Stainlesss will still stain... but stain less than carbon steel.

But to resolve this I think I will ask Wojtec76 (if he is still around) for a few of his broken ones (even if I have to buy them) and perform destructive tests that will put this issue to rest (and I'll get some rest). I want to know if it will take longer to stain or stain "less" than carbon steel under the same conditions or will there be no difference.