Even when the maintenance is short term, there is also optimization for making the expected type of changes quick and/or easy to perform, something that appears particularly hit or miss with language specific problems: having to fit monad square pegs into typeclass round holes when two libraries need to be used together, unexpectedly needing a significant increase of sophistication and/or boilerplate to support a generalization that should be small, finding a compromise between conflicting preludes or incompatible extensions.