I don't think HW is the problem as my 6 year old laptop
is fine for all usual tasks I need (web browsing, reading
email, office, cd-dvd burning and so on). So i suspect that
when my N900 will be 6 years old (unless the usb port breaks earlier)
it will still be fine for doing the tasks I expect.
There will always be a newer shinier better super phone
around the corner but it doesn't mean that I have to buy them all.