The interesting bit is the somewhat paradoxical result of longer load times after optimization, due to the page suddenly being more tolerable to use by those with slow connections. This is similar to the (somewhat controversial) idea that adding new lanes to highways can increase congestion [1]. That may not have any apparent direct application for the general developer community, but it's at least a modicum more useful than your comment.
> This is similar to the (somewhat controversial) idea that adding new lanes to highways can increase congestion
This is non controversial and known as Braess's paradox[0]: changing the graph characteristics alters the Nash equilibrium solution for a worse one (i.e the Nash equilibrium is not optimal).
It may not be controversial among experts, but it is definitely controversial when political fights break out about the use of funds for public transportation vs. highway widening.
