[radicalbyte]

It's in the same group as Pragmatic Programmer, Refactoring, Patterns of Application Architecture and the Gang-of-Four book for me. Still recommended for junior programmers as they're all teaching the core of good design.

However seeing as the better frameworks/languages/IDEs have internalised a lot of the learnings and that the specific conventions may be outdated - so just follow the recommendations for your platform/framework.

[is_true]

I feel like understanding why a framework does things in some way makes it easier to wrap my head around it.

There's a book about modernizing PHP applications that when you read it you feel you are reading about symfony's architecture.