IMHO they built the opposite of what's actually useful for real-world use. Copilot should have been trained to describe what a selected block of code does, not write a block of code from a description. It could be extremely useful when looking at new or under-documented codebases to have an AI that gives you a rough hint as to what some code might be doing. For example if you select some heinous spaghetti code function, press a button, and get a prompt back that says "This code looks like it's parsing HTML using regex (74.2% confidence)" it could be much easier for folks to be productive on big codebases.