We don't live in the open source world of the 1990s. People don't make this stuff in their basements. What was a community of devs that made things in their own time has turned into a huge industry supported system of semi-bullshit sharing. The OSS devs of the 90s wanted open source end products: a GIMP that could replace Photoshop. A blender that could replace 3D Studio. Today we mostly have OSS middleware.

As the other comments have stated, there have been several systemd drop in attempts, such as this one:

http://uselessd.darknedgy.net/

But maintaining them is terribly difficult when Redhat is pouring money into people to work on it full-time. There are lots of systemd-free forks, including ones for Debian and Arch. But you need a large user base to continue to use these forks so other people will be encouraged to support them. Money, donations and good ole kudos help too.

TL;DR we don't live in the open source world you think we do.