Related - there is now a QA Test Case written up for how to reuse an
existing "home" subvolume to mount at /home using Custom partitioning.
https://fedoraproject.org/wiki/QA:Testcase_partitioning_custom_btrfs_pres...
I wonder about the least effort way to incorporate it into docs. Maybe
as a quick doc. And then reference the quick doc as a NOTE inside the
current manual partitioning section of the install guide?
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A variation on that test case is dual boot Fedora (draft)
https://fedoraproject.org/wiki/User:Sumantrom/Draft/dualboot_f33_btrfs
As in Fedora 33 and Fedora 34 side by side; or Workstation and
Silverblue; or most any mix and match so long as GRUB is the
bootloader. It's the same instructions as reuse /home, but with
emphasis that /boot should not be reformatted or created new, but
shared. This is quite efficient on Btrfs because it's just a different
sysroot subvolume. No repartitioning or reformatting needed to do the
2nd installation.
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Chris Murphy