I'm wondering if these days "filing for IPO" is synonymous with "couldn't raise another large round." It seems so common for multi-billion dollar companies to d

I'm wondering if these days "filing for IPO" is synonymous with "couldn't raise another large round." It seems so common for multi-billion dollar companies to do a huge private equity financing (+$100MM) to push off Sarbanes-Oxley a few more extra years. Twitter, Dropbox, Facebook, Uber, GitHub, Airbnb, and Square have all done this. Maybe Goldman Sachs wasn't hungry for this one?