Modern semi-autos are very reliable, but not without some faults. In my 54 years of shooting handguns, I've never had an action-stopping jam or dropped magazine from any of my revolvers. I just wish my revolvers held as many rounds as my semi-auto CZ's and Sigs hold.
Police and military all left revolvers for semi autos. The semi is superior for self defense use. I have experienced revolver failure when the trigger on my Redhawk would not rebound on a fly in hunt in Alaska. Fire a round and then pull the trigger forward. A semi is flatter and easier to carry IWB and faster reloads as well as more capacity
I got banned on another web site for a debate that happened on this site. That's a first
