I've burned out once, but that was enough. I am working again but it's been more than 7 years and I'm not fully recovered. I'm very careful now not to paint myself into a corner (or let some manager do it for me) as I know I wouldn't survive the next time it happens. Also my ability to put crazy hours or handle stress has been permanently impaired. While I function normally, if stress is a glass that can take water until it starts to spill, my glass has permanently shrunk in size.
I keep less vital, less exciting positions and compliment the missing excitement or fulfillment with things from my personal life. I do miss those times when I had the complete overview and agency but it wasn't worth this.