Also, by restoring an entire system you cannot be sure you have a dormient virus/rootkit/malware hidden in it. I backup my basic system (as a txt list of linux

Also, by restoring an entire system you cannot be sure you have a dormient virus/rootkit/malware hidden in it. I backup my basic system (as a txt list of linux packages, in fact) and my data separately also because not all data are worth the same.