There are new operating systems coming out from time to time, but there are still many people that use older operating systems. Why is that, one might ask? There might be at least a few reasons behind it:
-The newest operating systems require a lot of RAM and many computers might not have enough RAM if they usually run many programs at once.
-Often it might not be worth to upgrade to a new operating system if it is just a little bit better simply because it costs a lot.
-Once people get used to something it is hard to change their habit.