I have one major gripe about that article. It's been written for a specific group - the sort of thing a college lecturer would produce for their students, but in the attempt to make it easy to digest, the digital side has been kind of blended together. MIDI, USB, Firewire - but then digital audio is simply left as optical, no mention about balanced EBU, 100 Ohm distribution and then BNC cables suddenly pop up because they are used to supply synchronisation. So it's not wrong, but incomplete and prone to being confused. The ethernet is mentioned and it's tagged with 'latency' - giving people the impression that you don't get any - well you don't get latency from cables anyway - analogue or digital, but no explanation of the causes of latency - it mentions power over ethernet, but with every manufacturer using ethernet for their stage boxes, and then like Behringer, also using it, but a different format, for their personal mixers - it deserves a little more explanation. Somebody reading it could get the wrong understanding of quite a bit of it.
The last paragraph just made me smile.
As you can see, once you have the full picture laid out in front of you it's not remotely as big of a deal as it seems. Just remember, you have analog and digital cables. Within analog you really only need to know about XLR and TRS/TS. XLR is for mics and is balanced. TRS is balanced and stereo-capable while TS is unbalanced and mono. You can transform an unbalanced signal to balanced through a D.I. box. For digital cables, the large majority of people will only ever use interface cables of either USB or Firewire and maybe a MIDI cable but probably not. That's really all you need to know about recording studio cables!
Really? How about screening, how about single core vs multi-core. Surely in a studio of any size, some mention of patchbays is needed - very few studios do not have them. No mention of cable maximum lengths - as in guitar high impedance, medium impedances for say keyboards, and of course lengths on firewire/usb - which foxes many people.
It's useful, but not comprehensive enough for the claim that it's all you need to know.