I haven't caught the wssm bug. the availability of .243 wssm ammo. is lacking for one, and then you can bet that it won't shoot both the very light varmit bullets and the heavier big game bullets equally well. It may shoot one or the other very well, but probably not both.
The old .243 win. has the ability to do about the same, and the store bought ammo. is very available in both light varmit configuration and heavier big game ammo.
The wssm. can only hold 4 shells, 3 in the mag. and one in the chamber. It obviously has a shorter stroke in the action, and can spit the bullets a few fps faster, but dead is dead and the .243 makes deer sized critters and smaller critters, dead!
But, if a man can afford to put another horse in the stable and can afford to feed it, then by all means, buy it.