This was in Go, but my org also uses Typescript, and Elixir.

I’ve had plenty of success with greenfield projects myself but using the copilot agent and opus 4.5 and 4.6. I completely vibecoded a small game for my 4 year old in 2 hours. It’s probably 20% of the way to being production ready if I wanted to release it, but it works and he loves it.

And yes people have had success with very simple prototypes and demos at work.