How is either any better than letting catching an exception or letting the code continue in the original spot. One gets a split off into a everythings ok here a file, or jump to there and process the problem ? Using Either ends up being "more" code because we get the branch for free with exceptions...And given FileCreation failed is an exception the flow will be most likely at least a bit different. Continuing on and checking later does not seem to make much sense most of the time.
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