> But have you ever contested the regular merge algorithm (ort by default) when it did work?
Depends on what you mean by 'contested', but yes. You can have "merge conflicts", that are even correct as far as the syntax is concerned, but are garbage on a semantic level.
I'm not talking about the conflicts. I'm talking about the hunks that were resolved successfully. Sometimes they're part of successful merges. Sometimes they're part of conflicted merges where some other hunk was in conflict.
