The reason why is that the .44 Rem Mag is what everyone thinks they “need” in a .44.
The last thing I’d want to carry concealed is a .44 Mag. Lots of noise, flash and recoil that I don’t need.
The .44 Special, like the .45 Colt, is a grand older cartridge with nice low pressures, lots of flexibility and the ability to launch really heavy bullets. I think a 5-round, stainless revolver in either round would be the bee’s knees for CCW.
Sadly, everyone appears to be chasing the plastic semi-auto market these days.
See my #42 re Smith 696.