Run & gun...
I'm not much into the drop leg/SAS style holsters mainly because of the run & gun nature of most of the open carry/armed details I work in.
As a combat MP(95B now called 31B), I knocked all over vehicles & tight spaces.
A M9 or a 1911a1 .45acp would get banged up a lot the way I'd carry it.
I'm not fond of pistol leashes or lanyards on sidearms for the same reason.
Boats, aircraft, SWAT, etc may call for a SAS rig but regular carry or field use isn't a high priority for me.