At the earliest, "vibecoding" was only possible with Claude 3.5, released July 2024 ... maaaybe Claude 3, released in March of that year...

It's worth mentioning that even today, Copilot is an underwhelming-to-the-point-obstructing kind of product. Microsoft sent salespeople and instructors to my job, all for naught. Copilot is a great example of how product > everything, and if you don't have a good product... well...