I would love to see the author cover more licenses. What a great read!
Regarding the MIT license itself, I always found this one part of the license text to be kind of odd/vague.
or substantial portions of the Software
I still use it for a couple of my random personal projects. However, the ISC license has been growing on me lately, and I may choose to use that in the future for my personal projects instead.
I would like to see the author (or someone) propose a new license with the corrections and improvements that the author suggested. Not that we need another license, but it would be neat to see how much better it could be.