Perhaps you can advise me, GS. My maternal Grandpa (born 1874) told me that I shouldn’t call my self “old” until I was at least 80. And since I expect to live to 160, it seemed only (Hobbit) logical, that the midpoint would properly divide youth from old age. But lately, folks tell me that 100 is the new 80, so I’m perplexed. Should I just put off Old Age a few more decades, or increase my life expectancy by four?