Just as a brief echo here, the DW came down this morning to my office crying. One of our hiking friends (I think a year younger than me), traveled to Thailand a month ago with her husband, experienced what they originally thought was a stomach virus, and found out it was liver cancer. She died this morning.
So longevity estimates are good in the average and no good for you in particular, unless you are average (we are all above average, like in Lake Woebegon).
My view has kind of been to maximize now while we are in the late 50's/60's and then see what happens.
I had two greatgrandfathers live past 95 and all four grandparents make it to 90. But my habits are bad. DW has a family history of early death but is a health nut (I assume she will outlive me since she is 4 years younger) and act accordingly.
But don't assume you will make it to 95. You should hedge.
Should we have passed up blowing 10k on the Scotland hike in June for our 40th, since we might make it to 95 and not spend as much as we are blowing this year? It's a tough question. It's dishonest, since I'm 97% sure we could afford it, even if we live to 95, but you get the point. I assume we will spend less, except upon health care in our 80's. We won't be hiking the Great Glen Way for dang sure, at least.