I can actually see some practical use for this. Imagine a textbook for programming or system administration with a built in terminal and feedback loop to walk students through examples and correct mistakes.

Oooh do you think that would work on my 96kbps mp3s?

We absolutely should have more specialized LLMs. That being said we have dozens of tools that convert documents and data. Also any engineer worth a nickel should be able to whip something up in an hour or so for most cases.