I'm curious - Are some of you actually suggesting that life-jackets have no useful function and should be removed?
Most definitely no. I'm all in favour of them, after all there are warmer waters too!
Lifejackets have been shown to almost double survival time in colder temps
Absolutely. However, in my particular example, that would only delay the inevitable by about how many minutes? Unless of course the ditching has taken place next to a vessel.