I also started in the 60s when every dive was an adventure dive. I was invisible, twelve feet tall, in perfect health, knew everything, had little to no imagination, and healed overnight.
In 2012 I have an older person's definition of "adventure", and while I'm comforted by a dive boat having an AED aboard, I'm still ultimately responsible for my own health issues. Demanding an AED be required on a dive boat because I'm older and a wee bit frailer is no more reasonable than mandating one in a strip club for the same reasons.
However, as in many things in life, I suspect the real decision to equip with an AED will someday be made based on dive op insurance rates and OSHA requirements.
Now that I've gotten that off my chest, please allow me to use this thread to express my deepest condolences to the diver's family and others affected by this loss. I'll remember you in my thoughts and prayers.