[rgoulter]

I've seen many keyboard PCBs support configuration with firmware such as QMK. (The wiki for the MechanicalKeyboards subreddit mentions other examples of firmware https://www.reddit.com/r/MechanicalKeyboards/wiki/firmware).

If you're comfortable with C (and setting up the toolchain in the right way), great.

Allowing customisation with Python is for greater accessibility.

[VectorLock]

Being able to change settings with regular files on an a virtual USB disk and not having to install a compiler to make these changes sounds great.