Years ago, Nokia deliberately split internally and erected silos: E series, N series, and mobiles. Only E was permitted to include in their devices features thought to be of interest to on-the-go business people. Only N was permitted to include in their devices features thought to be of interest to creative, media hungry, tech savvy users.
Meanwhile, neither E nor N tackled the tough work enhancing and preparing Symbian or its UIs for the future. By all accounts, Symbian C++ is no joy to work upon, and neither division wanted to be the fool who spent their precious budget allocations on development work the other division would take, use, and benefit from for free.
So as their technical foundation grew old and crumbled, E and N built the walls of their internal empires out of legions of middle managers. Customers were lost. Market share eroded.
Enhancements to Symbian and its UIs were blocked.
When Nokia at last recognized their position and developed a Qt ecosystem plan as their salvation
they found themselves weighed down by the cryptic fragility of Symbian
the underdeveloped state of Maemo