They originally stated back in June: "Starting in December, we will gradually open-source relevant programs and release open-source firmware to ensure enhanced security and transparency". Source: https://www.indiegogo.com/projects/avalon-nano-3-blockchain-smart-home#/updates/30

As of now there have been no further updates on this. In my opinion, if the goal is to promote transparency and enhance security through developer contributions, then the software and firmware should have been open-sourced from the very beginning. Don't get me wrong, the Nano 3 is awesome but personally I have little trust in proprietary or closed-source products, especially those that connect to home networks or require a phone app for interaction.

One thing that would be beneficial is if they allowed SSH access to the Nano 3's Linux operating system, which appears to have been removed in recent firmware versions. Currently, there seems to be no official method to access the OS without reverting to an earlier, now-unavailable firmware version, or engaging in complex tinkering and reverse-engineering. The closest I’ve gotten is accessing uBoot and system logs via a UART connection, but there's no straightforward way that I know of to fully interact with the OS.

Additionally, it would be very helpful if Canaan released more comprehensive technical documentation for both the hardware and software of the Nano 3. This would allow developers and enthusiasts to gain a deeper understanding of the device, facilitating more effective development, troubleshooting, and customization.