Safeties on Glocks were required because of ham fisted professionals who could not stop faffing with he trigger.
As for ergonomics, our Sig P229's have a god awful set up, decock and slide release too close together.
Funny that in all the high speed / advanced CQB courses etc I have been on these last 6 years or so I have NEVER seen an ND. Operator error YES, I myself am guilty (dropped mag through not checking it was fully seated,








http://www.youtube.com/watch?v=yLLIEcURhiA
.............but never an ND.