Discover is available in OpenMandriva repository. You can install it in easy way. OpenMandriva always provided its own tools for graphically installing packages, up to Lx3 release we called it rpmdrake which is currently abandoned due to our migration to DNF. Therefore, we have chosen a new graphic installer that supports DNF - dnfdragora. It will probably stay that way. Other tools like gnome-software, discover or apper remain as an option for users to manually install.
We did not choose discovera because it caused us more problem than it offered us advantages.
Anyway for me discover never worked correctly (at versious linux distros).
part 2. Unfortunately Btrfs works much slower in most tests than other file systems. For example much slower than ext4. Additionally, you may encounter some problem e.g. in some steam games. Hence, the default is ext4.
However, nothing prevents you from choosing btrfs yourself during the system installation.
I will agree that would be great. However a half dozen unpaid/volunteer developers might be hard pressed to do all that for OM Lx 4.1 release or even by OM Lx 5. But perhaps a worthy long term goal.
Why does it matter if BTRFS is default when it is so easy to select file system in Calamares installer? Or XFS or F2FS for that matter. (There are file systems in that list to not use for an operating system.)
Your English is fine for posting here. If anyone doesn’t understand something we just need to keep asking questions until we do.
(I wish I could blame my more stupid posts on other people’s language use but unfortunately that is not the problem… My stupid moments are all me.)