I would only wear them around the house, for exercising or for yard work these days.
The hairy male leg is unattractive per se, no matter how muscular. (And this is not mere sour grapes on my part. In my prime my thighs were a muscular 27.5 inches in circumference.)
I might wear shorts for hiking. (Used to, but probably wouldn't these days.)
I have never seen how shorts were materially more comfortable than lightweight, loose-fitting trousers. (Of course, the long pants worn almost exclusively by many shorts wearers are jeans--which are typically neither lightweight nor loose fitting!)
No man over 55 should let his legs be seen under any circumstances.