Back when I did more embedded systems as a profession I used various Forths and Schemes and it was far and away my preferred environment.

Those didn't run on a VM, though; while even the cheapest controllers are an order of magnitude (or two) faster than what I had back then I do wonder about the performance implications. For those types of systems portability wasn't really a concern, the worst case was that we'd upgrade the processor to a later family member, making the port almost always trivial.

Still, great to see.