Calamares has received quite some attention from its maintainers during the past few weeks.
The latest version arrives today tagged as 3.2.39, which introduces a configurable setup for Btrfs volumes in the “mount” module. Previously, Calamares used a hard-coded setup for systems using Btrfs as the default file system, such as Fedora Linux. With the new change, Calamares now lets distros that offer Btrfs by default to setup a custom Btrfs configuration via the mount.conf file.
However, the Calamares developers warn Linux OS maintainers who use their graphical installer that Btrfs support is still new and there are various issues that need be fixed before it’s ready for production use.