The downfall of the .32 Magnum is that it is chambered in firearms the size of J-frames. Why buy a .32 Magnum in a J-frame when you can get a .38 or .357? The Ruger Single-six in that caliber was a neat, albeit short lived little piece designed for small game, targets and such..
If a sub J-framed, 5-shot pocket snubbie was made- that'd be the ticket. Something in the size range of the break top S&W "lemon squeezers" would be ideal.
There is no dedicated platform for this cartridge, and that is, IMHO the one problem holding it back from widespread acceptance.
However, if they were to introduce something- brass and ammunition won't be found for a while, just like what happened to .380.
The market is flooded with diminutive jammamatics in .380, now when are we going to get a subcompact revolver?
I'm a revolver guy, and can never trust an self-loader. After all, Borchardt's invention is just passing fad.