I had a grandson of The Ole Man back in high school. We bought him as a rope horse that was having issues in the box (turns out he had some chiropractic issues). He had been ridden almost exclusively in arenas. We started trail riding him in the mountains. Within a year, he was one of the best trail horses to throw a leg over. I team penned on him, did a little break away roping, used him for 4-H fair one year, used him as a confidence buddy to haul colts and spent hundreds of hours on trails. I sold him to an adult novice who continued to trail ride him and love him. She even trail rode him by a game farm and was so proud that when he heard a rustle in the brush, he only stopped and looked as a rhino walked out, just on the other side of the fence!
He was a really good minded horse, really kind. His only real quirk was that he didn’t like being pastured alone, and would walk the fence. He was not herd bound and could be ridden away from the place without a flick of the ear, but he didn’t like being separated in the fields. The pasture that he fence walked did not even share a fence line with another horse field, so he may have been more content with a shared fence line.
He passed away a few years ago at around 30 years old. He continued to be an active trail horse up into his later 20s. I’ve heard of quite a few horses of that line that are healthy and long lived.