The problem with getting old, aside from not wanting to deal with training a pup. Is that you don't want to leave a heartbroken critter behind.
The solution my brother-in-law found, was to enquire at the vet about an animal that had to be given up when their owners were sent off to the geezer gulag due to dementia or whatever.
Those critters are used to being around slow moving, low energy types (not that any of you are that way!). This keeps what was a loyal companion from being sent to a shelter, with the only downside being that you probably won't get many years out of them.
My bother-in-law is on his second dog, technically his third, but he had to give the one up less than a month in, as the dog was too much for him to walk. Too big, too much energy, pulled him over several times while on a leash and old folks don't bounce.