Our software was completely written from the ground up. We started with an empty main.c file. :)
A number of us lead software engineers are on hacker news and we all love the latest programming languages. We got a bunch of really super cool stuff in here, but all in straight C and running in very little memory space. We're dying to start an engineering blog, we believe some of the lessons we learned about applying modern software engineering techniques to an embedded device are very valuable. (Fun fact! Embedded Engineers have been avoiding dynamic allocation well before it was cool!)
We're hoping to get proper continuations in sometime soon. :) Our main problem is saving/restoring the stack without losing too much performance! (Cycles equal battery life, I cannot justify pushing for a move to continuations if the battery life hit is noticeable to the user!)
Must have been very cool to be bit-saving and over-optimizing in our "era of plenty". Almost nobody cares about a couple extra MB nowadays. And starting from a blank main.c? Gutsy.
No comment on anything else mentioned:)