Hang in there and keep sewing! I'm 67 - I have lots of projects in my mind and in boxes in my sewing room! Now that I'm retired I finally have time for the things I want to do. My parents are both in fairly good health at 92 and 98 so I'm hoping to have 20+ more years to enjoy life. You may be moving a bit slower and need a nap now and then (I know I do) but keep on doing what you enjoy.