You've reminded me of the reason I loved Delphi's help. I think what I found most helpful (and most unusual for the "state of the art") was that most help pages had "see also" links. This allowed me to look up something similar to what I needed and just follow the links to what I really wanted.

I was able to use the Help pages as (almost?) my sole reference for the API. Something that just wasn't happening with Delphi's big competitor, VB.