16.04's HWE's updates will top out at the kernel version shipped in 18.04. I assume this is because you can then just use 18.04.
See: https://wiki.ubuntu.com/Kernel/RollingLTSEnablementStack as linked from: https://wiki.ubuntu.com/Kernel/LTSEnablementStack -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1734172 Title: Upgrade ZFS to 0.7.3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1734172/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs