>In the US, life expectancy at birth was around 53 in 1921. Today it's almost 79. That's a nearly 50% increase.

This has nothing to do with productivity rise and where do we see its results (what is discussed here), but about the merits of technology.

Even so, the raise in life expectancy at birth is about those low hanging hygiene practices (nothing to do with post 1950 techology) and a few vaccines (most of which available before 1950s).

Not any big technological breakthroughs, like artificial hearts and so on (which hardly make a dent), and with extremely little to do with any post 1950s tech.

So the question of the article in the domain still remains, where's all this benefit from the productivity rise.