Enough to know that a thong is just insurance, otherwise unnecessary. Packing Iron, look it up.
Ive looked through Packing Iron many times, its quite interesting, with some beautiful rigs, but theres a good reason hammer loops and retention straps evolved over time. And I feel insurance is a good thing, having had guns dropped out of holsters, snagged by brush, hammer cocked by brush on one occasion, that holster had an inferior strap location, over the trigger guard instead of over the hammer spur, which would have stopped the hammer. The gun did stay in the holster though. Riding horses through brush its easy to lose one and not realize it. It didnt happen to me but I know people that dropped them when riding.
Stuff happens, the more one carries in more situations, the more happens. Keeping the gun from getting either lost, or at best dropping in the dirt, gravel or rocks is a good thing.
I have a pretty nice copy of an 1890s Miles City holster I use quite a bit, mostly around the home place where Im not in brush, or dog walking in more open areas, and it looks great hanging on the peg by the cabin door, but I wouldnt carry it riding the motorcycle, or in brushy country without adding some sort of retention loop. Its intended for a Colt, meaning it fits a Ruger rather tightly, making it just about right to me, its still not as secure as a loop or strap. Most often I swap it for a Lawrence 120 with strap if more security is needed.