Personally, I take care of him, and cuddle him, and let him do all the things he loves as long as he's happy and comfortable.
I recently learned that there are people out there who don't. When their dogs get old, they bring them to a shelter and leave them. Done. And then go out and get another dog.
And when I heard about their behavior, I rushed to judgement - deciding immediately that anyone who could do that was despicable and loathsome. Beyond contemptible.
But I found out that there's a segment of the population that believes "it's what you do." They don't know that it's okay to cherish an animal throughout its life - however long that may be. It's what their families have always done, so it's what they do. When their pet reaches a certain age or level of infirmity, they relinquish it to a shelter.
Perhaps we need to work on educating people that they're allowed to love their old dogs forever. And stop seeing stories like this one:
Family surrenders 16-year-old Pomeranian to shelter because she's too old