I agree, the more I think about how to
- keep the evolving community engaged
- easily provide new capability for the N900 without split development resources

it has to be "n900 supports Maemo 6".

trying to retrofit too much stuff to M5 is expensive.
yet making M6 available for N900 gives quick access to a large team of users who'll be incented & excited to continue developing apps, report bugs on the M6 platform. Many of these issues are unlikely to be HW dependent, so this benefits new devices too

This is what I expect from an open, linux environment -- supporting a variety of HW really shouldn't be hard. maemo is intended to support multiple devices. Support is being ADDED for things like multitouch, but not at the removal of single-touch.

Google (android), Apple (iPhone OS), Microsoft (WinMob) are all doing some amount of upgrading of existing HW with new OS versions. In their case it's purely a push - but it keeps buyin to the platform, and may reduce support issues.

yet maemo not only has this but as I said above an "army" of testers out there helping improve the environment. To not utilise this to me is to say the community isn't valued.