The Cambridge Grammar of the English Language (Huddleston & Pullum), which was published in 2002, expanded the scope of the part of speech "preposition" to such a great extent that a significant number of words formerly labeled as "adverbs" and "subordinating conjunctions" in the traditional grammar were subsumed under "preposition".
Huddleston claimed in the book that such a dramatic re-analysis of parts of speech resulted from many years of research in the field of linguistics by many linguists. When I first read the book, it almost sounded like a majority of linguists, if not all, would agree with such a re-analysis. And I thought that the rationale behind the re-analysis was robust at least logically.
Now it's been more than a decade since the book was first published. And it still seems that non-linguists have yet to embrace the re-analysis. (I don't know about linguists in general.) No dictionary that I know of has reflected the re-analysis, when many are quick to update such newly-minted words as "selfie" in their entry.
Is it because the linguists actually don't agree that the re-analysis is necessary, or simply because the learning curve of non-linguists is not steep enough to bring about the change even in a decade, or because the re-analysis was not really accepted at all among linguists?