As we age it's not always that we "can't" do certain things that we've always enjoyed -vacations, travel, etc.. In many cases, long before we "can't", we find that the effort outweighs the enjoyment.
Yes, you can still make that trip, but is it still worth the effort that goes into preparing, packing, getting from point A to point B. For many of us, that's also a choice, sometimes long before the ":can't" comes into the picture.