There are comments saying that users of [competitor] take for granted that their device will get further updates. But that situation doesn't really compare to the jump from Maemo 5 to Harmattan/MeeGo, which represents a deep change in the OS plus a total rewrite of the applications.
Would users of [competitor] expect to get a totally renewed UX to their current devices, including all new pre-installed apps and a revamped OS?