I believe it's about potential. They could've been the second or third big mobile OS provider. They did incredibly well in enterprise (and now cloud computing)

I believe it's about potential. They could've been the second or third big mobile OS provider. They did incredibly well in enterprise (and now cloud computing) but they still left the field of mobile to Google and Apple. And there's no reason they couldn't do it, they had both the money and expertise to create something like Android.