Can we get a tl;dr? 21 pages? Ain't nobody got time for that.
Snap summaries make for reflexive reactions. That's the shallow kind of discussion we're hoping to avoid here. What we want in comments is reflection, which is slower, takes more energy, and leads to more considered exchanges.
More on the reflexive/reflective distinction: https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
There's a lot of long rubbish on the Internet. Being able to quickly distinguish it from good stuff is essential to using your time sensibly.
Frankly if you aren't willing to read the content you simply shouldn't comment on it until you have.
Frankly, if you aren't capable of summarizing the content, any other comment you'd make is probably rubbish.
The problem is tl;dr culture, which actively encourages people not to read the story, and, worse, to discuss the story without having read it.
This is so easy: you can almost entirely avoid the issue simply by avoiding the term "tldr".