Listened to the #btctkvr podcast where they discussed this in a good amount of detail.

Seems fascinating from a cybersecurity perspective, it seems everything is built to enable long term support and usability even if the company goes bust.

Bluetooth is run off a separate chip, and data are encrypted before it's sent to the chip both ways, so the chip knows no raw data.

It's a platform too, so should be fun from a dev perspective.