I used to be with "it". Then they redefined what "it" was and it wasn't what I was with. Now I can't be with what I used to be, because it's "it", but "it" is now different.

In other words, embrace, extend, extinguish.

The point is that the words don't really have a useful meaning anymore. It is especially important in technical topics to have terms with some specific meaning.

It's important to be able to construct specific meanings. You don't need terms to do that, and you run a major communication risk by relying on terms that you aren't willing to define. And if you define them first, then you can use them however you like.

And that is why, a century ago, German was used frequently in science: A language where every word is a literal description of its meaning.

It's less about prescriptive vs. descriptive linguistics and more about people trying to make what they're doing sound more awesome than it is. The dilution of terms is an unfortunate side effect.