This is a very interesting and current discussion.
I have flown many hours IFR/IMC on a single engine although usually, but not always, with a Martin Baker seat strapped to my back side. I have also flown world wide with 4 engines, 2 engines but never 3 unless one of the ones I took off with stopped working (which has happened!).
The PC12 argument is emotional not rational. It is statistically safer than most twin pistons and, to asnswer pace, very good at short field performance and mountain flying which is what is is designed for.
I have operated and love flying the King Air but have on several occassions declined a trip which a PC12 would have been perfect for.
Each to their own, but know your tools and make sure you use the right one and do not try to use a chissel as a screw driver or oyu will hurt yourself.
Stay safe
MM