Nokia has made a major mistake going from opensource to MS,
after 10+ yrs strictly using Nokia phone, I switched to samsung android
my family and friends moved to android
everybody happy

last year Nokia lost market share to samsung / android

even if in near future Nokia returns to opensource/android
it would be too late for me and most likely many others

happy customers rarely drop a brand unless dropped BY that brand

I am loyal to whatever serves me best when I need clean reliable technology

Its easy to loose a customer or market position (see yahoo)
but much harder or impossible to regain same position once wasted due to mismanagement and wrong decisions.