Clicked the headline expecting this to be TLDR, but the punchline was there: why not both. I get that not everyone has disposable quid to do so, but tech choices are personal. Then come the words needs, likes, prefers, optimizes, streamlines, convenience.
Fairly, when I saw Let Loose, I started thinking more and more about "drop in the monitor" computing replacing a desktop. Instead of a iMac, have a great monitor with a slot in it - slide in the iPad to do all the work, kind of like my very first mac, the Powerbook Duo. More precisely, an iPad dock so as not to obscure the second screen. Betcha a third party makes such a thing already.
Might not be far from a macOS dongle too. Much like a streaming stick, just plug it into a monitor, and it runs macOS.
Choices are good. Buy what you value. Kinda think that was the point of this article, so I concur.