I don’t know their internals, though clearly they choose to tightly couple every major GitHub system to the AI offering, in my eyes that seems like part of the problem (plus Azure cloud migration on top because Microsoft sounds like a disaster).
Anyways, you sound angry.
I like to talk trash about Microsoft as much as anyone, they made insanely bad product descisions in the past (copilot in ms word is one of many) but this is not one of them.