Like Dale53, I was "asleep" and missed the 36-6 too, for much the same reasons, and others, and when the 60-4 was released I did not make that mistake again. They are just about ideal in every way, especially if you are not a handloader. A handloader might prefer a .32 caliber, which S&W followed up with in making the Model 631 Target.
Along with the .22LR (M34/M63) and .22 WMRF (M51/M651) versions, I think these four guns make up sort of a "gang of four" small outdoorsman's revolvers which will probably never be equaled or exceeded.
When the Model 60-10 was released, I had great expectations for it, but the concept turned out to be inherently flawed, in terms of field shooting here in the midwest - at least in my opinion. (A westerner might see this differently.) The gun is difficult to use with any degree of small-game accuracy with full-powered loads, which are not necessary anyway, so it gains nothing over the 60-4.
I still have my 60-10 based on the theory that it might be desirable for other purposes. It may be that the 60-10 is a better self-defense gun than any of the other J-frame .357s. I tend to think so, but do not seem to be joined in that theory to any extent by others.