It has a bunch of concrete recommendations, and its explanation of how the GC works lets you see the rationale behind those recommendations, and extend them to novel situations.

It explains the middle-age death problem, a direct consequence of the generations, by giving you a mental framework to reason about the .net GC.

I used the insights in this article to build an application server back in 2005 or so that spent about 2% of its time in GC at full load.