My opinion on this is: semi auto is superior for most instances
The arguement that revolvers are more reliable may be true in vacuum, but in the field, not so much. Effectiveness, generally, is measured in accurate fire/time/distance, and semi autos in this measure are superior. Of course, most standard semi autos cannot match the raw power of some revolvers, but going back to the effectiveness equation, how much power is needed? I can see 100 years ago, but not today. There is a reason revolvers are no longer used in any military or police departments today. Revolvers are cool, and have their place.