This article makes the dubious assertion that a device that only supports 2.4 GHz Wi-Fi cannot be added to a network that has BSSs on both 2.4 GHz and 5 GHz i.e., a dual band router that uses the same SSID and credential on both bands. The article provides no indication as to what onboarding system or candidate device is evidence of the existence of the original assertion. What smart home device sucks this badly? And what terrible system was used to add it to the target network?

The article then "solves" the problem by advising users to use different SSIDs for each band. That is just terrible advice. Most users benefit from being able to roam from 2.4 GHz to 5 GHz at home much like they do when they are at work or on campus.

As a grad student teaching Intro To Programming in Ada (mid 90's), I also used self-prepared transparency sets, and handed out complete copies to my students. This was way more helpful to my students than forcing them to scribble down copies of stuff I wrote on the blackboard. They could focus on what I was talking about, rather than practicing to be extras in some sad dark ages movie playing monks hand copying the Bible. I know it was more helpful to them because I asked them, and a majority said they preferred

But I also didn't machine gun them with 94 slides for a 50 minute class. We would stay on one slide for quite some time, and while we talked about it, they would have their own copies to make additional notes on.