Neither APAs nor Zines are dead, really. Alarums & Excursions (A&E) is evidently still being published, at least according to it's entry in Wikipedia.

And there are still small press zines. There is a zine library here in cambridge that acts as a browsing library and 'museum' for Zines and Apas : http://www.papercutzinelibrary.org/

Blogs are a descendant of them, for sure, but there are two kinds of blogs. Amateur and 'pro', with the Pro ones (like those by various reporters and pundits) being far more commonly visible than the amateur ones.