It supports a few other devices based on the nRF52832 SoC and already has functionality like bluetooth mesh support as well as seemingly supporting the onboard sensors.
I looked into Zephyr a while ago. If I recall correctly, dev board is required to flash the applications.
Additionally, FTDI-UART (or similar) would be a nice-to-have and connected to dev board.
They also have support for MicroPython, which Iβm interested in, and JerryScript. Thereβs also the option to use mcuboot (https://mcuboot.com/) which after an initial flash might negate the need for devboard for future updates? (although Iβm not sure about the details of mcuboot in that regard)
I did have an initial port locally, I need to rebase it onto upstream 1.12 and retest as there were a few issues. I hope to get time to do that before long, the support for the nrf52 series chips in Zephyr is fairly decent.