I'd have to say, especially in my MDPV days, the benzodiazepine family has been an invaluable tool.
I have personally probably avoided having a heart attack\dying\seizing up ~5 times. I am almost always administering benzos to friends tripping too hard or crashing from stims.
I haven't personally had any crises lately, but a benzo should always be on hand, for probably everyone in BLTC. How many times do you guys think a serious medical event has been avoided because of benzodiazepine intervention in your lives?