Comment by liquidwax

Copilot also optimizes for speed to a degree. It's akin to advanced auto complete. IntelliJ auto-completion is great. As much as it pains to say this, I don't think I will be as effective writing Java in Vim as much as I am with IntelliJ. The key differentiator is the auto complete speed. Copilot I feel is just auto complete on steroids. It may not be perfect yet, but there is definitely a problem it solves.