I'm pretty sure when he wrote all of that stuff that he'd only been using Emacs for around a year. The benefit of someone that talented, or groks Emacs immediately, and is familiar enough with the outside-ecosystem to know what he wants to borrow, I suppose.
Just tried it out. For my personal workflow when working on overlong lines, the performance gain is HUGE! From unusable to actually decent. Not using find-file-literally and even syntax highlighting enabled.
I recently started actively bookmarking pages again recently (after being an early Pinboard customer, but not a particularly busy one). I wrote a script to email me 5 random bookmarks every day, so now I treat bookmarking as a "like" button; something I find interesting at the time, and may want to rediscover in the future. I rarely use bookmarks to find something I'm searching for though.
I recently created a daily "random 5 bookmarks" email using GitHub actions and Pinboard's API. I love it; it's a serendipitous reminder of things I once thought were interesting, and now I bookmark things with abandon just so they may show up again. I rarely use bookmarks to find something again because search is still low-friction, but that assumes I know what I'm looking for.
(I haven't actually done them myself yet, but they look great. Not a standalone resource, but good for practice)