Speaking from experience..........I was under instruction in the left hand seat of an AA-5 Cheetah which stalled onto a hedge and almost immediately burst into flames. Being a low wing aircraft with backward sliding canopy, I was able to open the canopy and haul myself out (albeit suffering burns on the way!). The instructor did not get out and I can only assume he was incapacitated.
Had it been a single door aircraft with the door on the starboard side, I don't think I'd be here today. I appreciate there are different accident scenarios but personally I think it's mad to only have one door and I avoid those type of aircraft whenever possible.