I got my first mac, an ibook, in 2005. I kept my IBM X41 (at that time, a quite fancy model :-D) because I thought Id have to in order to work as smoothly as before with stuff like protools, word etc.
Wrong. I never missed it. And Im reminded everytime i use a windows PC, those error messages you get constantly, runtime errors and 'WARNINGS'. Not on mac. I got a kernel panic once, and its annoying, but the machine simply explains in seven languages or so, that I need to restart the computer. How about that, windows? Instead of all those fatal error alerts? Id like that.
I only replaced the ibook because of how difficult it was to exchange the harddrive and the fact that it didnt support mor than 1gb of RAM. Im in online media, so I need plenty of space on the go when I empty my recorder and camera SD/flashdrives.
But I just replaced my internal 80 gb HDD in the black macbook with a 250Gb HDD - on new mac laptops HDD as well as RAM replacement is completely fool-proof. You cant go wrong, seriously, it took about five minutes.
Thats really a plus to me. As well as Time Machine, that function saved my *** a few times. I really dont get windows people insisting Apple are evil and mac-users are only interested in the status of flashing an expensive laptop. Its all about usability for me, and apple just does the job better than a pc with windows.