I believe this just isn't possible for a whole lot of projects. Codebases tend to grow so large, and people tend to come and go, so people don't really know mos

I believe this just isn't possible for a whole lot of projects. Codebases tend to grow so large, and people tend to come and go, so people don't really know most parts of the code, so then a lot of the time estimates are inaccurate to the point of being useless.