Competing with the Android/iOS duopoly was a war of attrition the Microsoft, Firefox, Canonical and Samsung (Tizen) all lost. If you don't have the resources that those companies do I have a hard time seeing how you survive, and I have no interest in investing in a platform that has an extremely high risk of being orphaned. I wish it was otherwise - earlier today I was lamenting that my Samsung Galaxy S7 is laggier a…
How do you define success? This is not a competitor to iOS/Android, it's for cheap low-end devices, which is still a sizable market. Try running Android on 256MB of RAM...
And I know about Android's problems there (and mentioned it). But Windows Phone and FirefoxOS both chased those markets and they're both basically gone now.