Most of these articles have a small amount of information they pad out. This was exactly the opposite, full of informatioin with little hints like "store $! in a variable".

I've been using bash for decades, and I still learned some new things, and of course being reminded of features I don't use much is always good.

If I were to suggest one thing, it would be links to primary documentation for some of these ideas. For example, I didn't know about PS4, but there must be a page that documents PS1, PS2, etc...

But that's a quibble. Good show, have claps!