Is copilot not gpt3.5 now (before I think it was gpt3)? It performs well even on languages it doesn’t even know. I write weird languages for fun and in VScode it quickly starts giving elaborate slabs of code for languages it only knows from my personal projects. I don’t use regular syntax generally (we have enough of those); my last abomination was a Unicode char apl like and it picked it up pretty fast.

It goes beyond languages. Yesterday I was editing a markdown file that was to become a post on a static site with movies. After I entered the title of a Taiwanese movie from the eighties, I jumped to the frontmatter to add some metadata about it. It autocompleted the director even before I typed the first letter of his name.

It was so unexpected for me that I had to pause for a second to process what happened.

I know someone who uses it with SAS, which isn't well known outside the analytics space. (Fun fact, SAS started out on punch cards.)