I haven’t reread every single article, but did browse the intro for most of them, since it was needed to properly mark them (scenario, history, …).
I acctually was surprised at how much good stuff appeared in the magazines over the years. It certainly feels to me that if you have a decent magazine colelction, you do not need much extra in the form of scenario books, potted histories, etc.
Tiny Tin Men Blog: http://snv-ttm.blogspot.com/
Wargaming Mechanics Blog: http://wargaming-mechanics.blogspot.com/
I have felt similar, browsing my old magazines. Taken as a whole they are an excellent resource, and I refer back to them often for scenarios and modelling tips. I am really hoping that one day Wargames Illustrated will release their more recent magazines as pdfs so I can complete my collection and perhaps the old Practical Wargamer too.