I've always heard the term used in the sense that the author is using it. Oil is a commodity because there are many producers of it and it doesn't matter which one you get it from since they're all making the same thing.
Aren't we in agreement with the author then, that tech work isn't quite the same as oil or burgers (ie it hasn't been commodotized, even though it's been commodifed?)
Or are you saying the two words mean the same thing?
The work many were doing 30 years ago - making shitty PHP websites - has been completely commodotized to the point where as a dev many of us don't touch it. Why would we now that business people have enough literacy to click something which looks pretty together with Wix or that other website-as-a-service which funds 95% of podcasts :-)
Or hire a designer / commodity PHP-shop to make them a Wordpress.
Perspective of someone who isn't really in this space: I've always seen them as the same thing, except commodification is talking about the idea in general while commoditization is taking about a specific product.