Some parts of the firmware have been removed for licensing reasons,
including: [...]
- The Bluetooth stack, except for a stub that will function in an emulator
[...]
Which suggests that the Bluetooth stack wasn't entirely of their own making, so perhaps any of Pebble's own additions were too intertwined (e.g. gave away too much Bluetooth stack vendor proprietary API info) to be easily separated?
Background on the "trust metric" implemented on the site: https://web.archive.org/web/20160304000542/https://advogato....
Apparently my account on the site is/was now more than a quarter of a century old... Gonna try to avoid thinking on that too deeply. :D
There's been a non-zero number of occasions since that time where I've observed situations that mirror the trust-based challenges Advogato sought to solve.
It is perhaps telling that as prescient as Raph's work on trust metrics was he later moved on to the notoriously challenging realm of font rendering--presumably because it seemed more tractable. :D