I replaced a garbage disposal yesterday. It took twice as long as it would have taken when I was younger.Damn dishwasher gave up the ghost after only four years, had to replace it.
Managed to crack a couple ribs on the bottom edge of the sink cabinet trying to reach the farthest leveler.
I still think I can do all these things but a simple dishwasher install took twice as long as it should and I limped away when it was over.
They don't tell you "golden years" is a euphemism.