For me, late 60s. No accident but I finally decided my abilities, vision, balance, and ancient skeleton should stay on the ground. These are also the reasons I stopped flying.
I frequently have to clean the front part of our 5th-wheel camper. At 13 ft., the top area is unreachable. Instead of ladders, I put my pickup bed alongside, clamber into the bed, and use a long brush to reach up from there. I have a level and “fenced” area to move around in, brushes, hose, bucket are all right beside me, and if I can’t reach a spot I just move the truck.
Instead of me climbing up, I just “raise the ground”. It’s a lot safer.