The ability to do a custom board with the microcontroller and your custom peripherals is key for doing a production run. Open source lisenced source files for t

The ability to do a custom board with the microcontroller and your custom peripherals is key for doing a production run. Open source lisenced source files for the board makes this very easy. The times where making custom silicon is desirable is way more rare. But hopefully open-source will be standard there too, one day.