AKICIF: Capitalization Question

I know there are lots of (punctuation and grammar) style geeks here, so maybe someone can tell me:
Has the use of Microsoft Word, LibreOffice, and others changed the rules of capitalization for (e.g.) titles of shorter works?  It used to be that one would capitalize all the words except non-leading articles and longer prepositions.  (At least that's how I learned it.)  So it would be "Devil in a Blue Dress", but "The Man Without a Country".
Now when you're using a word-processing app, and ask for capitalization, it capitalizes every word, e.g., "Devil In A Blue Dress", and "The Man Without A Country".
Has any style manual endorsed this, or do I need to keep tweaking all my transformations?
--
The forest was shrinking, but the trees kept cheering and voting
for the axe. Because its handle was made of wood, and they
thought it was one of them. [@Strandjunker on Mastodon]