They do this on purpose, create non-interchangable disposable parts and EOL the system by ending manufacture of those parts.

You can do what the article says and just buy a double bladed razor, more environmentally friendly because you don't get stuck in this trap, the disposable part is just steel, it's easily manufactured and not proprietary. Or, you can buy the disposable parts for your electric shaver with the shaver, keeping in mind the actual, working lifespan of the device. Or, you can use a straight razor and a strop, no disposable parts necessary.