My maternal grandparents are in their mid 90s and as recently as right before the pandemic they were both entirely independent, so it's not impossible.

Part of their secret seems to be living on the fourth floor without an elevator for seventy plus years and going out on a daily basis.

I can't hope to live this long due to years of leading a sedentary lifestyle, but I invested in an apartment that's more than 64 steps above ground and on top of that has two levels, so every time need something from the kitchen I have to go down and up again to where I have my desk.

I don't think this is the right way to look at this data.

It's a probability distribution you have a certain % of probability to die each year, which grows and peaks around the distribution peak.

The % probability continues to grow past the distribution peak. If you have made it that long, you are still more likely to die each year you go on living.

I feel exactly the same way. But I also recognize that many many many people who have been born, lived a long life, and died, felt exactly the same way.

I used to think it was very likely that by the time I am old, "old" will be 100+. I'm not very sure of that now.

Are there any life extension technologies at all, assuming an already healthy person? The only one I'm aware of that's definitely effective is caloric restriction, and last I heard that was only proven in smaller creatures and not confirmed in humans.

Exercise extends your life. I think this would qualify since you'd be considered healthy if you exercise a moderate amount, but if you exercise more than a moderate amount, it further increases longevity.

See: https://www.health.harvard.edu/blog/can-exercise-extend-your...

(Not sure if exercise counts as a "technology", though. Maybe exercise equipment does.)

A good place to start is Outlive. It's less technology, more lifestyle. https://peterattiamd.com/outlive/

This strikes me as very unlikely. And if something like that will be developed, it will be priced out to the stratosphere, because most people will be willing to pay whatever it takes to get the treatment.

Imagine its a treatment rather than an expensive suite of continual treatments. Your proposition seems fairly US centric wheras most places would give it away and rejoice in the savings implied by not having to pay old age related costs.

Even here why wouldn't you just force your government to make enough for everyone at cost and string up the owners front trees if they object strenuously enough?

Even something as simple as a steady supply of Tylenol could have commanded a king's ransom before analgesics became available. You are likely right that it would be prohibitively expensive at first, but such treatment would go down in price as society redirects resources away from things like Bitcoin and into the new life extension technology.

If you get hit by a bus, we'll do our best to put "(don't put this on my headstone if a bus hits me next week)" on your headstone.