I'd argue that forum sites are primarily document based. We've managed to emulate the functionality of a 1990s (or 80s!) dial up BBS and scale it up 100x (now

I'd argue that forum sites are primarily document based. We've managed to emulate the functionality of a 1990s (or 80s!) dial up BBS and scale it up 100x (now instead of a thread having 200 replies it may have 20k replies), at and we are only needing a few thousand times the bandwidth and CPU power to do it! Joy!