Something Secret This Way Comes
This a total tangent but I always thought it might be interesting if an IDE pulled data from source control (and presented it inline somehow).<p>How "hot" a function is - has it reiceved a lot of edits in the recent past? Or is cold and old (and therefore you'd imagine reasonably bug-free for most use cases).<p>I think the number of unqiue people editing a portion of code would also be interesting to know. As you might expect multiple authors to have different beliefs about the point of the code and therefore the code is probably going to be more muddy and less clear.