In my experience unified diff is good for small changes. Split diff like meld is good for many changes in a long file. Many diffs in a long long file, you shoul

In my experience unified diff is good for small changes. Split diff like meld is good for many changes in a long file. Many diffs in a long long file, you should not have such a file. For large PRs with many files the problem is not so big because they are the sum of many small changes, file by file. Maybe a team should aim at small PRs but sometimes having to change X into Y everywhere, with a large X or Y, is an inescapable fact of life.