It is because Beijing technocrats, by making this change, would lose control of their economy, starting with the banking system.

FORBES: The Final Liberalization of the Renminbi

The system makes it difficult for voters to force a change in the political control of the authorities and, as a result, may stay at home.

BBC: Low turnout boosts Labour plans to change system

The introduction of Windows smartphones has been the big change under chief executive Stephen Elop, who phased out the Symbian operating system shortly after he took control of the company in 2010.

BBC: Nokia shares rise despite losses