I was at the MS MVP Summit ~7 years ago and they had a Bing engineer give a presentation/breakout on a similar VS plugin that used the bing knowledge graph (iirc). I was crazy impressed with how well/relevant its recommendations were, but I know I didn't end up using it nor hearing anything else about it. Given how good the results were back then, my guess is that this type of thing doesn't fill a real need. That doesn't make it, and this GPT-3 version any less cool though.
I've noticed that none of these companies ever try to create AI for Middle Management...