Williams definitely wrote his stuff for a different generation of engineer - a generation where not everyone had access to the internet, and it behooved LTC to pack as much info into one document as possible.
The mark of just how good AN-47 is that, even in the age of the internet, it's still one of the best go-to guides on high speed opamp design and the attendant/surrounding challenges. Particularly concerning proper oscilloscope techniques for accurate measurements of high speed circuits.
