In a shared source, I wonder if it would be useful to make a theme that used brighter colours for segments of code that were more ‘contentious’, I.e. had a lot

In a shared source, I wonder if it would be useful to make a theme that used brighter colours for segments of code that were more ‘contentious’, I.e. had a lot of changes? I guess it doesn’t work because a lot of contentious code is re-written (deleted and re-created). Or maybe newer code could be brighter, and older code (not touched for a long time) could fade?