Why does Ubuntu 18.04 doesn't create multiple BTRFS subvolumes anymore during installation by default?

[Thorsten Schöning]

Hi all,

during installation of Ubuntu 16.04 LTS Server I could choose manual
partitioning and create a /-partition using BTRFS. The installer
automatically mapped that to creating one subvolume called @ for /
itself and and another one called @home for /home.

That doesn't seem to be the case anymore for UB 18.04 LTS Server, I
only managed to get one BTRFS subvolume for / itself if I only create
one partition. It seems I'm able to create multiple different
partitions with different mount points, but I prefer the former
behaviour of one partition containing multiple subvolumes.

Am I'm doing something wrong or do I miss something in the
installer-usage or does have things simply changed for some reason? In
case of the latter, is there any discussion somewhere on why that was
changed? Did the former setup have any downsides that needed to be
addressed with the new release? Are there maybe any plans to restore
the old behaviour if the new installer has matured? 

I couldn't find any such discussion myself, only descriptions about
the old behaviour[1] of UB 16.04.

Thanks!

[1]: https://wiki.ubuntuusers.de/Installieren_auf_Btrfs-Dateisystem/

Mit freundlichen Grüßen,

Thorsten Schöning

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