I think the main difference between revolvers and pistols is that, in the event of a stoppage, a semi-auto can be cleared and returned to action. When a revolver on the other hand, suffers a stoppage, it is usually out of action and cannot readily be returned to firing in a heartbeat or two.

Both systems require that the user know how to clean, inspect and maintain his firearm. For example, an undetected loose extractor rod on a revolver will lock up the cylinder. This isn't a problem on the range but in a life or death situation, will you be able to detect the cause and correct it without tools so that the gun may be reloaded?

Improper reloading technique with a revolver may allow unburned powder to fall under the extractor star, raising it enough to prevent the cylinder from closing.

Yes, I use both systems in self defense but I know how to keep each system functioning and how to perform preventive inspection and maintenance.