I think the layout could use some work, but the prototypes of the ARM 3DoT using an NRF52840 chip are doing great - being able to use almost any pin for anything makes the board a lot more flexible!

Of course, the AVR processor is still preferred for educational purposes, for ease of use explaining the 8-bit architecture and simple assembly language.

Both versions now also have a QR code to guide you to the app download and setup instructions. Funnily enough it seems like adding the QR code to the board made the PCB manufacturers increase the print quality of the silkscreen, since the rest of the silkscreen also looks sharper now.