I agree and disagree ... on one side this may signal a shift away from Python. Something to help the migration effort and the ultimate goal is to write everything in Go.
... but then I don't see Python going anywhere anytime soon. Didn't Microsoft just start a project to get Python's runtime to use CoreCLR's JIT?
There was an article, can't find it now, about an upcoming Python renaissance saying there may be an influx of new interpreters. There's PyPy, Microsoft's CoreCLR thing, now this, etc. It seems people really want to program in Python so there is an effort to make it faster.
Devs love Python and will continue to do so, no question there.
I'm just afraid the surge of different compilers and interpreters will bring up plenty of issues in the medium term.
There is no formal spec of Python like there is for, eg, Javascript. (which is of course driven by multiple, VERY engaged adopters).
How long until subtle and not so subtle differences creep in between different implementations, leading to incompatabilities and a continuous fragmentation of the ecosystem?
Not exactly an endorsement.
Sadly, the code was just dumped into a new Git repo, so no way to tell how many people contributed internally so far.