To sum it up: C3 moves forward so slowly.
I think we move quickly and get a great deal done given the size of our team.
They are 70-80% done
Across thousands of users, everyone considers a different set of things as 100% done. If you develop software used by many people, it is basically impossible to make something that everyone agrees is 100% done - it's a never-ending task for each individual feature. Part of designing software is having to make judgement calls about how far you go with each feature, and where to draw the line and move on to other things other people want.