For someone with an irrational fear of reloading, maybe.
I see the 17HMR as about as big a step up in rimfire performance as I would be willing to chance. Enough market penetration as to pretty much ensure ammo supply into the future, along with the availability of a lot of already existing hardware that will accept the round without any real modifications other than a barrel change.
For the money, reloading a hundred rounds is pretty easy to match, with the benefit that you can actually tune the ammo to the rifle, rather than just buying the stuff, crossing your fingers, and hoping it shoots well.
I'd be really happy to see the rifles that might handle the WSM, chambered instead in something like the 5.7 FN round, reload able, small, and not based on the old rimmed Hornet, with its thin case walls.
Really not feeling the love for spending that kind of coin on single use ammo, me.