It relates the audience and the author on an emotional level.

Once an argument has been laid out in detail, providing a poignant summary in one sentence leaves a more lasting impression on the reader.

So your argument is that all technical advancement in the last 50/60 years is just marketing?

That’s a pretty bold statement supported by literally nothing, just because you don’t feel like certain tech has added anything doesn’t mean it hasn’t.

Productivity is an incredibly hard thing to capture, especially with the move to away from manufacturing and physical production.

One could easily argue that the productivity numbers are failing to increase because technology has lowered the barriers to entry all over the world so now there’s more competition for every good and service creating pricing pressure on the “value of goods and services produced”

I think you may have replied to the wrong person? Your comment is on topic for the tree, but doesn't appear to apply at all to the person you directly replied to.