Unclear. They don't give their reasoning beyond "complicated = bad", and very specifically leave it up to the imagination of the reader.
While they make some interesting points with regards to overcomplication and scope creep, there are also good reasons why we're still not using programs like ed as text editors, such as it being arcane and unintuitive.
vi will at least helpfully point out :exit is not an editor command. Instead, ed will not-so-helpfully point out ?.
When you think of a bloated text editor, you would not expect VI to be that. If anything, it's closer to the opposite.
Although that only hides the sponsored segments, they're still there, and potentially influencing the advice he gives.
But not too much pressure, or else you will also become a puddle of goo.
A fair few of them can be caused by other things too, or are just one of the "normal traits" ADHD exaggerates. 9, 12, 13, 15 could be caused by stress/burnout, for example.
Considering the tiny token size (1MB?), you might be able to squeeze an editor into an NFT. Heavens knows why you would, but you can.
"blockchain" tends to be rather iffy too, especially since it's seemingly inevitably tied with cryptocurrency or something like it in some form or another.
Or find all the flaws after the fact, and feel bad for not doing a perfect job.