I don't know that I'd necessarily agree. Yes, a .22mag revolver SEEMS to have more versatility than a .22lr revolver, but honestly not by much. Both will kill a rabbit or squirrel at pretty much any range you can hit it, and both will be extremely undersized for coyotes (50yrd weapon for either WMR or LR at best).

The difference in power in a revolver just isn't worth much. We're not talking about 100yrd performance here.

Also, the convertibles I've seen have been rather inaccurate with one or the other. Maybe you don't care about tack driving accuracy, but personally, I want my weapons to be able to shoot better than I can shoot them, and I've found at least two 22cal convertibles that I could outperform when shooting one load or the other. The unfortunate truth to that is that if it shoots better with 22lr than 22WMR, that means it's less accurate when I'm actually using it for hunting, and would want it MORE accurate for ethical shot placement. On the flip side, if it's more accurate with the 22WMR than the 22LR, then I know it'll be less accurate for the majority of my shooting, which would be plinking and practice. The downside is that you don't necessarily know which it will favor until you shoot it. No, I'm not talking about a difference of shooting dimes at 50yrds with one and shooting fridges at 15ft with the other, but I DID have a single six convertible that shot cloverleafs at 10yrds with .22lr, but was about 2" groups at 10yrds with .22mag.

Ultimately, the real reason I don't see any more "versatility" in the convertible than a standard revolver is that the power difference just doesn't mean much. A 9mm/.357mag convertible makes a big difference in price, and a huge difference in power and use. 9mm is great for plinking, but too small for deer. THAT makes sense. But the .22lr and the .22WMR are both small game rounds, and both are range limited in handguns by the shooters skill, not necessarily by the power of the round at range.