TKLBAM is a backup system you can use to move anywhere with
Turnkeylinux's TKLBAM is an extremely easy and fundamentally reliable backup system with which you can have remarkable system independence.
I just looked over my backup repository that I have from TurnkeyLinux. Some of the backups go back 8 years, and realistically they likely started a few years before that. That is not an eon, but that is a pretty good run in terms of working on one primary system on the web. Yes, there are other ways to do backups and knowing how, and doing a few, is always a good idea. That being said, I just upgraded the server I am writing this to, literally installing a new system, restoring our data and moving forward in what was about 10 minutes and perhaps 4 words typed in my specific build system.
What sounds simple certainly is not simple on the back end. Maintinaing a catalog, migrating a catalog. Moving Data but not kernel files is all part of that process.
But in the words of TurnkeyLinux talking about their TKLBAM "It just Works". Give it a try. You will be happy you did.