[pphysch]

I'm not convinced it's a useful abstraction. It is obvious that text vs. pictures vs. sound and so on have different semantic capabilities, e.g. try describing a new color to someone who has never had functional eyes.

However, it is not something I would read or write books exclusively about.

https://www.urbandictionary.com/define.php?term=Insight%20Po...

[poetically]

What exactly is the abstraction here? McLuhan is describing something very concrete that is not obvious to most people.

[waserwill]

I'm interested in how culture changes and where it can go/is going. Knowing about what ideas or forms of thinking different media favor -- this seems useful to me. It's part of the 'selective landscape' of culture.