Am I wrong as basis of long term investment (as I, like many of you, keep my devices active for a long time) to buy into the new Lumia series given Mr. Nadella's recent statements describing WM "unsustainable" and his stronger efforts for an agnostic (OS-wise) presence on other mobile platforms? Do you think these devices will enjoy the lifespan that the 1520 enjoyed?
Long term? No.
WP devices days are numbered. The moment the "Surface phone" is out, WP is gone. It's not hard to foresee that. Just think:
1 - WP is a money loser. Is Microsoft in the business of losing money? No.
2 - Nadella admits it's unsustainable. Is Microsoft in the business of unsustainability? No.
3 - Chris Whatsisname comments on the need to have a device that breaks through and truly innovates. Is any WP device that? No.
4 - Universal Windows Apps. Is it catching on? Have you seen the app gap on WP diminish since WP10 and the new Lumias were officially released? No.
It doesn't take a lot to understand that Microsoft will not continue for much longer to lose money on this. They have their services fully functional (and functioning better, actually) on Android and iOS. They have plenty of other platforms where they are successful. They will lose absolutely nothing by removing WP from the equation. Even the UWP vision doesn't actually
need mobile phones. It will still have Windows PCs, Windows IoT (and a lot of the furute goes through here), XBone, HoloLens etc to fall on.
So no.
It's not a good long term investment. And if WP lasts half the lifespan of the Nokia 1520 it will already be an accomplishment.