I haven't tried RescueZilla yet, but I have the ISO file to burn when I am ready to use it. But as I understand it, its just a more user friendly version of Clonezilla is all. So I am sure I will love it too. Look to RescueZilla when you want to do drive cloning, or entire drive backups and restores.
However, if you just had a bad update, but you can still get into your system, either normally, or in safe mode, well, you could just do Timeshift backups for those. Thats what I did recently!
StarTreker
Your Tech Support Guru