I haven't updated OS X and Ubuntu for quite some time now. The reason is large updates. An 80MB update for iTunes cannot be justified. Oh, and I don't want a new Linux kernel every week, thank you very much. I might just be lazy, but I find that large updates are a big turnoff (not _just_ because I have a 512kilobit/sec connection, or because I have a 100GB data cap). Something like bsdiff would definitely be a good idea. Google are using something called Courgette for pushing Chrome updates: http://blog.chromium.org/2009/07/smaller-is-faster-and-safer-too.html Smaller updates also mean lower bandwidth costs for mirrors. Also, we don't want to clog the tubes, do we? :p -- Salut, General Maximus