I worked for a company that was making a large CASE tool way back when and even at the time it felt like nonsense.

Internally it never even crossed our minds to use it as a means of building the tools themselves. I remember bringing this up at one point during a company meeting and the CEO glowered at me like I was pointing out some inconstancy in religious theology. He spun some web of garbage about why it wasn't appropriate for our specific needs. I was young and realized only afterward that it was just not something you were supposed to mention there.

It was actually fun to work on for a while and we sold a lot of product, but it eventually dried up along with the rest of that part of the industry.