Because of the increase in life longevity, America can now assume that at any given time three, and perhaps four, former presidents will still be alive, even when the current president is occupying the White House. ↗
Mere longevity is a good thing for those who watch Life from the side lines. For those who play the game, an hour may be a year, a single day's work an achievement for eternity. ↗
If I can make a career for myself after Potter, and it goes well, and is varied and with longevity, then that puts to bed the 'child actors argument'. ↗