> IMO, Nokia killed Symbian, Meego/ Maemo et al. through managerial cowardice and a "fight it out amongst yourselves" mentality. Microsoft only turned up and delivered the mercy blow.
Certainly Nokia, as the top phone maker in the world, had many development projects that competed with each other. This is how product development works, but they could have been more efficient. It was Elop, Microsoft's wooden horse, that delivered 'the blow' with his burning platforms memo. He killed Symbian production even when there were outstanding orders. He killed the N9, and N9x0, even though it was outselling Lumix in the countries that were allowed to have it.
Microsoft did 'turn up' to buy the division because they were switching to Android (Nokia-X) and then 'delivered the mercy blow' to Windows Phone/Windows 10 Mobile by closing it all down.