Because I believe in fighting the attitude comedian Louis C.K. describes as "Everything's amazing, nobody's happy," here's what I posted in response:
Half a century ago there's a better than even chance I would be a widower and most likely, Theo would be in the ground with Ruth, if he'd been born at all.
30 years ago my grandfather died unexpectedly because of a congenital hereditary defect; today, his sons can be tested for that defect and will not die from it.
Twenty years ago HIV was a death sentence.
One of my best friends has identical twin girls whose chance of surviving birth would've been only 50/50 20-25 years ago; in this decade, they were never in any danger.
My cousin has a heart defect and would've been dead the day he was born, if he'd been born just 15 years ago.
One of my best friends had a heart defect repaired last year, a procedure that could add anywhere from 20-50 years to her life and greatly improve the quality of that life.
With the exception of HIV, these are just stories from the tiny, tiny number of people I know personally.
Some of these dates are almost certainly inaccurate, as I just wrote off the cuff. Regardless, I'm grateful to live in such amazing times, and to still have all these people alive to share it with.