Throughout my time on CDC, and now CFF, I've run into several very knowledgeable hockey posters, but from the heights of capgeek onward the game has gradually changed a bit. Hockey knowledge can relate to the history of the game, personal anecdotes, and so on, but a lot of hockey knowledge is drawn from accessing hockey resources; sometimes hockey knowledge involves knowing which resources to access, knowing how to read graphs, charts and so on, and being willing to simply put the reading time and effort in. Sometimes it's following certain insides, youtubers, podcasts, and so on.
This is even true amongst hockey professionals, the widespread use of capfriendly amongst league front offices speaks to that. Another example of this is Luongo's looking at elite prospects during the past draft.
On forums such as this one, HF, reddit, and so on, being able to back up what you're arguing is something that folks regularly find themselves doing, or trying to do.
So, for those of us who do regularly engage with hockey resources, which ones do you find yourself using?