Ubuntu wants to strip some of GRUB features in 26.10 for security purposes

Ubuntu proposes removing several GRUB features in version 26.10 for security, including support for btrfs/xfs/zfs filesystems, image formats, LVM, and LUKS-encrypted boot partitions, requiring /boot on raw ext4. The community has pushed back significantly, noting that btrfs boot-to-snapshot setups, software RAID1, LUKS2-encrypted /boot, and flavor-specific GRUB themes all depend on the features slated for removal, and some suggest switching to systemd-boot instead.