With initV, issuing many command in sequence to the same service (enable, then start… stop then start… etc) is much quicker and easier as it’s “up-arrow, control-W, type new command. With the systemd option I either need to navigate one word to the left (or more depending on how the shell is configured wrt word separation) before I replace the command, or I need to delete both the command and the service name, and retype more.
It’s not a huge difference but small downgrades in ergonomics add up over time.