Woah, is this suggesting that the cumulative human-years experienced by current living US population will add up to the age of the entire universe?

Mind-boggled again!

>>> 27600000000 / 332000000

83.13253012048193

According to google the current life expectancy (in 2020) is:

77.28 years

So a touch shy, but almost.

and this <waves hands around> is all we have to show for it?

There are these two nice videos with the (apparently now outdated?) 13 billion years:

To Scale: TIME: https://www.youtube.com/watch?v=nOVvEbH2GC0

Timelapse of the entire Universe: https://www.youtube.com/watch?v=TBikbn5XJhg

A few minutes in, this video talks about billions of trillions of trillions years into the future.

https://www.youtube.com/watch?v=uD4izuDMUQA

Food for thought: https://en.wikipedia.org/wiki/Timeline_of_the_far_future

Video version: https://youtu.be/uD4izuDMUQA

if it wasn't for those pesky extinction level events that come about every now and then

Compare that to the size of the observable universe which is a sphere with a diameter of 5 x 10^23 kilometers.

Or to the number of stars in the observable universe - 200 x 10^21. One star / (roughly corresponding) solar system is unimaginably huge and then there's so many of them.

In comparison to some of these other measures, the age on the order of 10s of billion years seems actually surprisingly modest.