I don't see the point. Either shut it down completely because it's not worth the investment to maintain or do it properly. Test driven development is a practic

I don't see the point. Either shut it down completely because it's not worth the investment to maintain or do it properly. Test driven development is a practice that is most valuable on legacy code. Only doing it on new code and not old code is ass-backwards. If anything it should be the other way around. A half assed hack job to support remaining customers will likely only end up alienating them when you inevitably break stuff they rely upon with duct tape. Alienated customers tend to drop you forever and run into a competitor's arms. YMMV but that's always been my experience.