Maybe systemd has won the day, but that's no reason to stop people from working on a systemd-free system if that's what they want to do. Maybe systemd will turn out to be the disaster the naysayers were predicting and we'll all be happy they didn't give up. More likely, it will remain a hobby project for a handful of people who are resisting change for the sake of resisting change.
Ultimately, though, that's their choice. When systemd really started taking over, one of the regular comments was that people who didn't like it were free to fork their own distributions that didn't use it. Nobody who said that back then should complain because somebody took them seriously. As long as they aren't actively interfering with anyone else, they should be free to pursue their interests. Real freedom of choice includes the freedom to make unpopular choices.