Back when I first installed Manjaro on one of my machines, I had decided to start with plain vanilla instead of setting it up with BTRFS. Rather than have the automatic snapshots and backing up that BTRFS offered (among other things) I stayed with what was comfortable for me – imaging the drive(s) and learning to use Timeshift (and later on, Restic to backup my data). I’ve had to use Timeshift to go back a snapshot a few times and I’ve found it very simple to use. Timeshift can be set to run automatically although I’ve left it on manual. I believe it was a good decision now that I’ve seen the number of forum posts associated with problems that mention BTRFS.
I admit I was a bit naive in my belief that a rolling release OS would require less work than having to fully reinstall MX Linux every year or so. My process in doing the Manjaro updates entails doing a Timeshift snapshot, backing up my data with Restic, and using Rescuezilla to image the install (not including the swap partition). This is done for multiple computers here and it only gets done after reading through the forum posts for the update’s announcement thread to see what problems have been encountered and how to deal with them. It does take up a bit of time and it can get pretty involved one or two times each month when the updates are released. Much of this is mentioned in @Aragorn’s excellent post at [Consideration] Is Manjaro the right distribution for you?