[sidenote] I’m well aware that you currently have a lot of work on your hands with PlatformIO and I realize that my request will probably end quite low on your todo list. Nevertheless:
I’m currently using the Arduino Uno. Very nice piece of kit, yet I’m running against both its Flash and SRAM limits. Therefore I’m looking at upgrading to a more powerful board and the Arduino Zero appears like a logical next step: same, easy-to-use form factor yet with a far more powerful microcontroller (Atmel SAMD21, Cortex-M0+). I’ve got the impression that the current Arduino board portfolio is built around the SAMD21 so I guess others would also want to use this µC with Embeetle. However, Embeetle doesn’t appear to support it yet.
In short, I would like to use the Arduino Zero with Embeetle. Is there anything I can do myself to help you with this?