In the event of a mid-air or some other catastrophic event at my usual 2,000 to 4,000ft altitude I do not think I could assess the situation fast enough to get out of my PA28 and leave sufficient altitude to have a parachute open.
In particular I do not think I would be able to get the door open due to the relative wind.
Twenty years ago I used to fly a Robin Aiglon with my brother, it had tabs to pull to eject the canopy - if I were flying that airplane I would have no worries about getting out.
On my inter island flights I typically fly at 7,000 to 9,000ft - it would have to be a lost wing to make me want to get out without my raft and other survival gear - again the problem of getting the door open.
So no parachute for me.