Whereas Google will release something, get user traction and then try to make it 'best in the world'. If it doesn't get to world class status, then it cancels it and moves on, pissing off the early adopters in the process.
The problem is that this becomes counter-productive just like serial dramas in the TV world. If people think you're going to cancel something, they're not going to get emotionally invested in your product. Then it almost certainly gets canceled because it doesn't get enough user traction. Rinse. Repeat.