I think the term "unmaintainable list" is quite fuzzy and unclear. There's numerous lists which will likely never be fully complete, but still a source of useful information.
Maybe unmaintainable needs to be clarified more and consolidated with keeping of valid information. If all the articles have articles and the list doesn't provide any info apart from the songs themselves and not the artist or year, for example, it could've been made into a category.
Not because some people find lists to be obsolete with categories, but simply because it would work in this particular case.
--Mgm