An old, yellowed copy of The Elements of Style by Strunk and White sits on my bookshelf. I read it years ago, probably several times. It seemed like it contained good advice on writing. Writers I respect have recommended it to me.
“Keep related words together” is further explained in these terms: “The subject of a sentence and the principal verb should not, as a rule, be separated by a phrase or clause that can be transferred to the beginning.” That is a negative passive, containing an adjective, with the subject separated from the principal verb by a phrase (“as a rule”) that could easily have been transferred to the beginning. Another quadruple violation.
Oh, but there is so much more. I can almost taste the bile. It should be noted though that Pullum has co-authored (with Rodney Huddleston) The Cambridge Grammar of the English Language. So the invective he directs toward Strunk and White comes with substantial credibility.
Pullum’s rant is a fun read, for those so inclined.