I think you will find that the best holsters are fitted to specificconcealable The reason kydex is so popular is this fit while keeping cost down. Many old timers will disagree but even a custom leather holster fails where kydex is strongest: adjustable retention. Retention is critical in a proper reliable holster. What good is a holster if the pistol falls out?
Oh it's just in my pocket, it won't ever fall out. Says the guy who shot himself bc it fell out and he grabbed at it on the way down and... Well shit happens.