> the upgrade time wasn't even significantly longer
I wonder if it works like FileVault, where there's a notion of a "partially converted" volume and blocks are slowly converted as a background-idle task after the update completes.
I wonder if it works like FileVault, where there's a notion of a "partially converted" volume and blocks are slowly converted as a background-idle task after the update completes.
[1] https://btrfs.wiki.kernel.org/index.php/Conversion_from_Ext3