@ThreeBadgersInATrenchcoat well, I don't think they should just add m$'s repo and key. AFAIK dpkg has no vendor lock so m$ could just push other packages with newer versions and users would get updated to potentially malicious software.
Should an low-power arm device really have to run an Electron IDE?
Also, why doesn't the rpi team compile VSCode themselves and put it in their own repo.