What do you see as an issue in technical writing, if anything past not concise or well written?
His explanations focus on the most important bits (which he has skillfully prioritized based on his expert knowledge) and avoid highly domain specific nomenclature i.e. he gives a thorough-yet-concise explanation in a way that a reasonably intelligent lay person can understand.
Does that make sense?
It broke programming down to its most fundamental and important building blocks without all the baggage of machine/operating system/application/dependency/etc specific stuff.
[1] https://www.youtube.com/watch?v=2Op3QLzMgSY&list=PL8FE88AA54...