Don't get me wrong , I like .44Spl , and part of my internet handle is a tribute to the .44Spl.
But once upon a decade when I thought I had a Jonsing for a snub .44Mag , the primary reasoning to justify such a beast was to have Power , lots of power.
Alas I also had a chrono. The then reigning benchmark to beat for " way powerful, more or less carriable , and controlable in rapid fire " was steel 1911 with .45acp +P . ( I guess I can say this on a S&W forum , since Smith now makes 1911's.). CorBon .45+P from a 5in set a high bar to match , much less meaningfully exceede. Had to use hefty charges of Blue Dot to do it. ( More choices now , but in mid '80s for slower than Unique/ faster & cleaner than 2400 pretty much was Blue Dot.) I was able to do so , a 240gr at a little under 1100fps. But the muzzle flip was bad, and the blast nasty. I fired it hunting in an open field , ONCE. It left my ears ringing for several hours.
I chrono'ed warm .44Spl loads in it and 4in M624. The M624 had close to 100fps more vel , while much less noisy and much more controlable. For the final straw on the icing , I did a careful side by side comparison with 4in M65 , and rotated back.
I still have said .44, mainly because of it was present to myself for a milestone event. For it's use since had used mainly .44Spls.
Big bore snubs are an interesting concept, with .44Spl, .45Colt, .45AR . For full powered Magnum you need at least 4in to be worthwhile , 5in is better ( or 4 5/8 for SA revolvers).