point is they weren't pushing the technology, they were pushing the existing form factor, not thinking ahead.

I could be wrong, but I recall an exec at one of their events on stage doubling down and saying they know better than Apple - that people want buttons (or something like that), which basically means their decline was inevitable due to the culture

I thought something different. If I recall correctly, they did already make a full touchscreen phone prototype 3 years before, but they dismissed the idea because of how clunky the UX was. So they dismissed the iPhone because of that experience, they already researched the form factor, the hardware, and deduced it was a dead-end. But I am no Nokia engineer, I have no insight on that (and that may have lead them to developing Maemo/MeeGo, but by the time it arrived the corporates already decided the fate of Nokia).