Btrfs doesn't do snapshots on its own. I would believe you're talking about OpenSuse's snapper instead?
And experiences from 6 years ago are pretty much worthless (the work on btrfs started a decade ago!).
Making a case for ZFS is pretty straight forward due to the overwhelming amount of articles that appraise it as the best filesystem around (see e.g. this or this article).
And yes, you are correct, the issues I had were related to OpenSuse's snapper utility, if I remember correctly, I wasn't really running out of disk space, it was more related to the meta data and the system thus reporting that I was running out of disk space and thus cannot mount the partition. In the meantime, I switched my main production systems from openSUSE to CentOS/Fedora and back to old-school file systems. I started reading up on the btrbk utility, which seems to be a rather good approach towards that problem.
The post was edited 1 time, last by dkxls ().