It has a lot of libraries, so it can be fun to play with. I am a bit perplexed that they used Python and Javascript for most of their system.
https://github.com/Coldcard
This is what they wrote about it:
> We’re hopeful that altcoin proponents will be able to take our system and extend it to support their speciality crypto coins. It should help that all of the firmware is written in MicroPython.
https://blog.coinkite.com/coldcard-annoucement/