My initial argument was that Andriod would be a good next step for the N900 post Maemo 5.
I did, and I like the N900 as hardware. I just see the shortcomings with Maemo as software.
The current community and number/quality of applications is not comparable to the other major platforms.
There's one proper game (Angry Birds) and a handful of actually useful apps. This will improve over time but no where near as quickly as other platforms.