Kam Leo wrote:
It probably has less to do with the boot process and more with disto
upgrading; i.e. less likely that user files get clobbered if /usr is
separate.
Nope. It has everything to do with booting. Some packages in /bin
depended on libs in /usr/lib{64} so calling the init script before /usr
is mounted would fail. There's a discussion about this in the devel list
if you search the history for it.