One thing that people miss - either out of ignorance, or because it goes against the narrative - is that systemd is modular.
One part handles init and services (and related things like mounts and sockets, because it makes sense to do that), one handles user sessions (logind), one handles logging (journald), one handles networking (networkd) etc etc.
You don’t have to use networkd, or their efi bootloader, or their kernel install tool, or the other hostname/name resolution/userdb/tmpfiles etc etc tools.
There is a db migration command that I used to do the same thing, was pretty painless, just needed to run that and then update the config iirc