Update apps..

The biggest problem on windows and osx is the lack of a centralised update mechanism...

There's a built in updater, but it's only for the core os, and osx's updater is only for apple apps.

Ubuntu has a much better system, a single centralised updater that not only has a huge selection of packages by default, but third party developers can register their own repositories when you install an app, so they will get updated automatically in the same place too.

By contrast on windows and osx, each vendor has to make their own update procedure, either making people do it manually (which they wont, resulting in loads of security holes) or running a background process to do it for them (which really slows the machine down once you have a lot of them running).