I could certainly do just that and when I find the time to do so I will (around the same time I jailbreak my 10.1 to install CM once the camera support works). But this is a consumer device, not some sort of hacker's toy and that means (IMO of course) that different rules apply here. And that's where Apple gets it right: my fiancee's 2 year-old IPhone is as responsive as the day she got it.

PS A factory reset on my G1 last year restored its responsiveness for a day or two. Sigh...