As a firearms instructor, gun store manager, private investigator, competitive shooter, and all-around gun nut, I have had occasion to use many types of holsters for multiple purposes over the last few decades. Many of these holsters are quite specialized and therefore currently reside barely used in boxes and drawers in my cluttered gun room. A very few favorites are nearly as well-worn as my years-old leather wallet, and with them I feel the same intimate familiarity. Broken-in and supple, I hardly have to think to put them on or draw or reholster.
If you live in a CCW (concealed weapons) state and carry a gun daily and are lucky enough to grow old with such a holster, you win. Like a cowboy hat or a good pair of boots, it takes a lot of everyday use to get them the way you like them, and they become very personal.
But holsters are used for many different purposes. For years I competed in IPSC (International Practical Shooting Confederation) shooting a stock Glock with nothing more than a sturdy wide belt, an inexpensive Uncle Mike's #15 holster and a double mag pouch with all straps removed. I sometimes still use these today, and I can't give a higher gear recommendation for cost versus quality for this purpose.