I have not so far been able to download the 4.3 gig DVD iso file after a number of attempts from various mirrors - I have not found any in New Zealand.
Professor Knopper has it seems removed systemd from Knoppix.
"The still controversial startup systemd, which has been
a little outrageous due to security vulnerabilities just recently,
has been integrated in Debian since Jessie [8.0], and has been removed
since Knoppix 8.5. I bypass hard dependencies on the boot system with my
own packages.
To still get a systemd-like session management,
and thus retain the ability to shut down and restart the system as a
normal user, I run the session manager "elogind" instead. This bypasses
systemd's interference with many system components and reduces the
complexity of the overall system. If you want to start your own services
at startup, you do not need to create any systemd units, but simply
enter them in the text file /etc/rc.local, which contains explanatory examples."