Minor request: can we have 'neural network' or something in the title? This is related to the machine learning 'transformer' architecture, rather than the bundle of coils that couples two circuits electromagnetically.
That was my second thought. My first thought was coils of wire wrapping iron cores done by someone who does not know what they're doing.
"Electrical transformer without any formal training in electric engineering" is basically how the title read to me. Followed by a lot of confusion when the article was not that.
Good on him, it's just... an odd way to phrase it :)