AI or no AI...some people work every day and never seem to actually do ... anything. Every time I've looked at this kind of metric it has reinforced my existing opinion about the person I'm looking at.

I think "concurrency is difficult" is because if we DONT harp on it, people who haven't learned the lesson yet just pretend that all the hard parts don't exist. How many python programmers up in arms about the GIL without understanding the why?