Versatility, as required !!
One last thing I think was mentioned: the revolver allows the use of shot-shells for snakes. Shot-shells won't reliably work the action on most semi-auto handguns.
As well as Shorts and Longs.
Yes, there are still some of us that shoot these ......
Be Safe !!!
'Fundamental truths' are easy to recognize because they are verified daily through simple observation and thus, require no testing.