In concept , I really want to have love for cross draw , But ...
Being a beefy kinda guy , while a vertical at 9:00 would conceal well , I can't reach it well in that position. To work for concealment and meaningful rapid access , it would have to be radically raked , and 10:30-ish , AND short enough gun to not protrude the muzzle out beyond my left hip. Amazingly I do have such a setup with a dual angle Ross Leather thumbreak , and a 3.5in Vaquero. But that is a very narrow set of circumstances not easy to set up .
Instead I have come to prefer carrying a second belt gun as a straight left hand holster. It works for me as I can do reasonably well with weak hand only , or shift hands if ample time is available.
But there is a nother area where cross draw does shine. For field use of large revolvers , where concealment per se is not a big deal , but be able to comfortably drive , sit , etc . This works well with 6.5 and 7.5in bbls.