I don’t know about the old fellas working the regionals. I found the multi sector days (up to 8) pretty tough in my 20s with no ground support.
I wouldn’t want to do it 65+ that’s for sure.
I personally love flying with the older guys and always learn a lot from them. After all, many of these guys earned their stripes flying with the guys who were the pioneers.
I don’t think it’s a solution though, and let’s face it. You don’t hang your hat up and then want to go fly a Saab to CTAFs in marginal weather. If you really wanted to fly, you could have stayed at least a domestic captain.