Comment by yencabulator

My personal theory is where Nokia failed was worrying too much about Osborne effect[1] of their Linux-based phones on their Symbian business, or there being some behind-the-scenes contract clauses that tied them to Symbian too much.

[1]: https://en.wikipedia.org/wiki/Osborne_effect

Background/disclaimer: My business partner made a prototype touchscreen keyboard for Nokia, running on unreleased Linux hardware. Nokia had a significant Linux codebase very early on.