[jghn]

It might have to do with how longtime "longtime developer" means.

I took a look at TFA because of this. My experience caps out at doing a few heathkits in the early 80s and one single soldering of a resistor on my Synology to repair an issue a few years ago. I *mostly* understood the diagram, most of which was due to seeing it during CS adjacent classes in the early 90s.

Unfortunately it's often the case that these ELI5 type articles assume baseline knowledge that's less than baseline.