I feel like this is something that might exist, as it exists in some applications, and particularly in coding in general. The idea is that when you go to do a render, you'd have the option to "profile" the render, which would tell you (e.g.) how much time/% of each frame's generation is taken up by-- then each plugin, composite, track move, etc., etc., thus giving you an idea of what things you can do to improve render times. It might make sense to be able to select any piece of your project and profile that-- it helps make creative decisions when time is a premium.

And speaking of rendering, the rendering time counters don't show times past 24 hours-- it rolls over, but no days are shown. Expected behavior would more-likely be that the hours keep going past 24, and not bother with days.