If I try and remove sysv-rc it then just installs openrc at the same time, so still stuck
Also it then starts doing a lot of slightly scary stuff with service runlevels and init.d including saying:Code
Um. Okay, I did some digging and thinking on this and it wasn't sysv-rc or openrc that I was uninstalling, it was insserv. Since systemd-sysv does exactly the same thing as insserv according to a couple of different sources, and since it's recommended they NOT be installed alongside each other, you should be fine once that's uninstalled. Do research it of course, but consider this bug report to Debian, where it's mentioned they shouldn't be installed alongside each other.