That's not quite right.

Let's replace my comments with Ubuntu Intrepid and Ubuntu Karmic koala.

Sure, intrepid gets orphaned - but I can then use Karmic. Mostly, this same can be said for windows.. but with windows you pay for an upgrade. However, windows offers discounted upgrade versions of the OS for previous customers.

So for your argument to be taken seriously... Nokia would need to offer an upgrade device for cheaper to those that already have an N900... or, of course, bring M6 to the N900 and give us the option of loading it.