lulf[m]: > <@lulf_:matrix.org> The reasons I'm thinking using a HAL directly in discovery book is this:
> 
> - It's more easily relatable to other boards
> - It's easier to port the example code to other hardware
> - It's less maintenance overhead than to go via a board support crate.
> - The board itself doesn't seem to be a particular important part of the discovery book teachings.

Indeed, the chosen board is secondary as long as it's affordable, easy to obtain and provides enough ready-to-use hardware to actually demonstrate something (without requiring electronics knowledge).