Solid point, and flushing a buffer isn't necessarily the best example, other than I think it's an obvious place where a less-than-experienced dev is forced to deal with a Result they don't know what to do with and might turn to a beguilingly simple operator that seems to make the problem go away but encourages them to just keep punting Results up the call stack.

But you could make the case that I'm being overly pessimistic in focusing on the worst case mess that could be made with this feature.