viyoriya Because any software on your computer is a potential vulnerability. We spend a lot of time each we getting things updated so that you aren't at risk. Ignoring updates, even if you don't think you need them, leaves you potentially vulnerable. The Security updates we provide are only for CVE fixes that we know about. You could just remove xorg-driver-video-nouveau and not have to think about it. Also the nvidia-*-modaliases files are just for hardware detection and you may remove those as well.
When we get around to the Software Center update later this year, we will not be distinguishing between required updates and other updates. All updates will be required to reduce the likelihood of breakage. They may be labelled separately to be informative, but I'm tired of finding out that someone's system is woefully broken because they have held back updates for months on end.
