For fellow people on HN, if your have not read Infinite Jest I very highly recommend the audiobook version of it. I was not able to get through it reading it as its such a large book but I found the audio version quite enjoyable.
While there isn't a specific section covering endnotes, they are interspersed sparingly as tonal changes in the narrator's voice. This effect is used in other readings of his works and is easy to follow.
While reading it I sorted the tech he described in his own invented terms and compared them to what's available now... there are many parallels...
I recommend reading it...
If you need priming listen to his 2013 commencement speech--This is Water--delivered at Kenyon College...
https://www.youtube.com/watch?v=8CrOL-ydFMI