Let's face it, people love tradition, culture history and an underdog. Revolvers win that argument over semi's any day of the week.
Revolvers have been around the better part of 200 years where semi-auto's have only been around 100 years, only the last 35 of which have been with widespread popularity.
I'm not one to argue the merits of one vs another because I'm a fan of both, but when I own, shoot &/or look at a well made revolver it's a totally different feeling.
In a SHTF situation my first pistol choice would be a high quality semi auto but have no fears with a revolver. One finds it's way into my pocket 70% of the time for concealed carry..