I’m just trying to be absolute on the fact that incremental change of a single running system is more efficient and shouldn’t be confused with ‘rewrite’ project

I’m just trying to be absolute on the fact that incremental change of a single running system is more efficient and shouldn’t be confused with ‘rewrite’ projects where a second system, that is not used by the business yet, is developed while the business continue to use the ‘old’ one. Calling incremental improvement a form of rewrite gives it a bad name :) I’d argue that rewrites that are a second system that (hopefully) eventually get deployed once the features exceed current system is not incremental at all, but is instead Big Bang. Even if the features of second system are built incrementally, if the business aren’t using it until it is finished then it is Big Bang.