I’m my career, UI rewrites have been By far the most successful. It may just be anecdotal, but my assumption has been that most of the edge cases are more easi

I’m my career, UI rewrites have been By far the most successful. It may just be anecdotal, but my assumption has been that most of the edge cases are more easily identified because UIs are by nature going to have most of their business logic visible to the human eye.