After n97 , nokia never made a perfect product.. n95 was the last one..

true n900 is damn amazing , but it has some huge imperfections to make it a all around great device, had nokia focused on the n900 instead of other symbian devices at the time , they would have been better off than huge boxed tile os

Of course. But it happened, so no point in discussing it any longer. These decisions are political, not technology dependent/related. In hindsight you can find thousands of decisions like that, made by thousands of individuals and companies, and it never makes anybody any wiser to mull them over when it is too late.