@hko Ah, I missed you were on it (I joined remotely and was hiking while listening 🙂)!

I didn't really want to engage either. But when I had to, I found them useful.

I think this aspect may be the almost proverbial "build vs understand", "scientist vs engineer" etc split?

I'd never casually use it for something I want/need to fully understand. But that doesn't describe all my problems. For some, understanding (even a subset of) the constraints can be sufficient for them to be "solved".