? I think you're confused somewhat. I don't know about Windows Mobile, but Android specifically kills processes and applications to regain memory. If you prefer that, go with those.

I want to be in the control of my phone and don't want the phone "helpfully" killing an application I've started. N9 handles multitasking wonderfully, and can run quite a many applications at the same time without detriment to the performance. But it is like your desktop computer, run too many and performance will suffer. Like in your desktop, you then quit applications that you don't need. And thanks to Harmattan's multitasking view it is very simple.