This isn’t necessarily the case. In my experience, the teams that want rewrites have built big monoliths with no design, lots of coupling, and lots of copy-and-

This isn’t necessarily the case. In my experience, the teams that want rewrites have built big monoliths with no design, lots of coupling, and lots of copy-and-paste code (basically a ‘big ball of mud’). So, what the rewrite does is introduce an architecture that decouples (often valuable) functionality into small, targeted functions and libraries. This enables easier maintenance and modification. It also fixes the brittleness and fragility. So, the goal isn’t to keep the monolith as is. Instead, it’s to break up its functionality into small parts. Then, the parts may be joined so that the old interfaces work as they did before. But, they may also be used to build entirely new interfaces.