The only reason I want these things to be any smarter is because I need them to do more work over longer periods screwing up. The only reason I need them to do more work over long periods is because they are too slow to properly pair with.

If I could have it read more of my project in a single gulp and produce the 10-1000 lines of code I want in a few seconds, I wouldn't need it to go off and write the thousands of lines on its own in the background. But because even trivial changes can take minutes by the time it slurps up the right context and futzes with the linter and types, that ideal pair programmer loop is less attractive.