> Note: This does leave a slight chance of regression on upgrade from
> mitaka-updates (trust) to xenial-updates if for some reason upstart is
> used on xenial.
Not really, as an upgrader to Xenial will use systemd which already
does the ordering right by considering the sysV headers and building a
chain based on that.
Due to that I think this isn't even a small window for an upgrade regression.
> Note: This does leave a slight chance of regression on upgrade from
> mitaka-updates (trust) to xenial-updates if for some reason upstart is
> used on xenial.
Not really, as an upgrader to Xenial will use systemd which already
does the ordering right by considering the sysV headers and building a
chain based on that.
Due to that I think this isn't even a small window for an upgrade regression.