@McTag,
I'm sure that you would come across the odd thing that Fowler got right, McTag, probability being what it is. But that doesn't mean that Fowler should be looked at as some sort of authority on language.
As was mentioned, it's so damn out of date that it is pretty much useless. So useless in fact that language scientists only refer to it to point out just how silly some folks were when it came to describing the workings of language.
No dialect of English can accurately be described as transient. As regards AmE, I read more than once where an author suggests that AmE is more conservative with regard to structure than is BrE.
Now, why were those three examples ungrammatical?