Saying that a software is god awful when it's commercially successful is not a good argument. Certainly tons of people and orgs out there are deriving value out of it. I still have to see anything that comes closer to Confluence for arranging organisational knowledge
I am implying that there's evidence that more people like it and are willing to pay for it than people not finding it upto the mark. Yes, that's the definition of a successful software.
Software success seems to be 90% about advertising and finding innovative ways to destroy your competition. Microsoft are the masters of that approach.
