Worm was so damn good, but I feel obligated to put a warning here. It's not just a lengthy novel, it's an extremely lengthy novel. Starting reading Worm can cause significantly decreased productivity for roughly the next month.
I honestly don't understand how it's not published yet. Yeah, it's extremely lengthy, and may need to get slimmed down in editing, but it's just so good, better by far than most current published SF out there.
I think Wildbow simply finds it more interesting to work on Pact than to work on editing Worm.