This sort of basic advice (use browser features to defer loading, and plead with the masters not to ask for so much JavaScript) is obviously already considered by the HN audience and so this link is basically useless.
I sincerely doubt 100% of the HN audience always considers those things.
You might think some of those things are basic, but that doesn't make them useless.
This kind of lack of empathy for new learners can make it incredibly difficult to teach concepts to those who don't have as much knowledge as you may have.
This sort of basic advice (use browser features to defer loading, and plead with the masters not to ask for so much JavaScript) is obviously already considered by the HN audience and so this link is basically useless.