"We were playing with it in January. And we decided it wasn't good enough. It was too held back by some system architecture limitations that we had and feeling more like a toy and it didn't really have the power that we think it needed to deliver on the promise of what it was.

And so we made a tough decision there to go back to the drawing board, and basically consider a completely different type of architecture, starting from scratch, basically, including actually a much deeper set of changes to the system to enable what we want to build there.