I'm always interested in running WASM in microcontrollers, but AFAIK there is a severe limitation of WASM spec: the minimum size of heap (WASM memory page) is 64KiB, which is too big for many of microcontrollers. Otherwise a WASM module must run in stack-only mode.
Unless this problem is resolved I don't think WASM can be adopt widely in the world of microcontrollers.
Unless this problem is resolved I don't think WASM can be adopt widely in the world of microcontrollers.