Sorry JJ I posted my last while you were posting yours.
I don't know if the G-BYPA accident would have occured if not for MM GPS, but I am sure that most of us who operate in the corporate world would not undertake alone some of the trips we do at night if it were not for that equipment. I know I wouldn't sometimes, just as sometimes I wouldn't undertake some IMC trips to private sites and let down without it (can of worms opened, but it is what happens in the real world as you know), Admittedly having a firmly attached yellow streak down my back (and kids at home) I wouldn't undertake those trips without the traditional kit (VOR, DME, ADF) on board to back up what the occasionally untruthful GPS is telling me.
And before anyone asks I am talking about all of the above in an IFR Twin,
You have indeed incited an interesting and informative debate !
GS