Rewriting implies rewriting legacy code (regressions) and wasting time. This isn’t necessarily true. A few years ago, we rewrote a large part of a web-based UI

Rewriting implies rewriting legacy code (regressions) and wasting time. This isn’t necessarily true. A few years ago, we rewrote a large part of a web-based UI. The original implementation was a Java applet, a reasonable choice for an interactive diagram at the time it was first written. However, over time the applet had become a liability because browsers were planning to drop support, and in the meantime some useful alternative technologies had become available. In a situation where you are porting an established system to run on a new platform, rewriting really is the only way and therefore isn’t a waste of time.