There are tools[0] that show you which users touched which files/modules and how many of those users (if any!) are still in the company. Doesn't necessarily te

There are tools[0] that show you which users touched which files/modules and how many of those users (if any!) are still in the company. Doesn't necessarily tell you what code is legacy – perhaps a function is just so solid, that there was no reason to touch it in years. But I've found such analysis helpful and it can give you warning signs about what knowledge is being lost in the team and which parts of your own codebase became unknown territory. [0] I know of CodeScene but suppose there are others