Really good idea.
Unfortunately backuped only all “relevant” data. Forgot about the special fixes and settings i had to apply 7-/8ish years ago to a newly bought high-value laptop to make it work properly… 
So my fault. Nevertheless kind of irritating that newly installing such a (newer) system 7, 8 years later still produces the same well known problems (that could have been solved within those years…). At least i tried every mentioned fix to realise, they don’t seem to work anymore.
But as mentioned, apart from that the Librem 13 still runs marvelously like a charme with more than 6h battery life. Premium i’d say…