I still feel it’s a good thing to have for some added safety, even for rare situations.

http://www.cirruspilots.org/Content/CAPSHistory.aspx

sure but the problem with adding things for safety is that it just gives so much more that can go wrong.

Ok, adding parachutes to a civillian airliner – lets see, we need to punch more holes in it for the parachute attachments, make room for the chutes – check the flammability! Wire up the system… now, auto deploy or manual? Auto requires software (better have that checked), manual requires more wiring for the button (better add a guard to that) – oh! i’m forgetting the explosive bolts that’ll remove bits of the airlplane to fire the parachute and whilst we are at that how often should the system be checked……

It’s not just add something to increase safety there are a million other things to be aware of.