Sailfish OS started from parts that were open sourced from MeeGo-project, practically Mer-core and Nemo. There was no refined, complete OS to start from in sense that it would have been only to take and integrate them together (not to mention supporting infrastructure around it and all the bits and pieces that had to be done to integrate newer versions of Qt, Wayland etc.). So on that regard, definition of "three years old" is not that accurate.

In comparison, Android inc. was founded 2003 - it's 12 years before now. It started much like Sailfish did, Google aquired it in 2005. So it has had 10 years of huge resources of Google behind it. Apple's iOS has roots in their iPod, until Jobs figured out that it would make perfect UI for smartphone. It took them quite some time to get necessary functions integrated. Yet, you seem to expect that Jolla develops Sailfish on par with those with fraction of time and resources, and without concrete support from 3rd parties providing/developing certain services. I'd say it's unrealistic.