As someone mentioned it, why exactly don't we routinely carry parachutes in GA aircraft?
Having come from a gliding background before getting my PPL I've always wondered. There was an amazing picture of a glider pilot using his recently following a mid air, couldn't help thinking if that was a C172 he'd have just been sat in the seat watching the ground rush up instead.
I see plenty of examples in the accident reports were everyone is killed (IMC spiral dive into the ground for example) where they would have almost certainly all lived if they had 'hit the silk' once things had started to go wrong.
There's two parachutes at my club I'm the SE cupboard but imagine the funny looks I'd get if I wore one for a trip in the C152/72!