That's what Devuan does.
Slackware hasn't adopted it (yet?).
Gentoo took the sane approach and gives their users choice of init system.

Good luck building a distro that play nice with your fork, then. Systemd is embedded deep in most distro, replacing it without breaking things is not an easy task.

Damn. It's only being talked about and people have already folded.

It's only a date field. Then it'll only be an API for other service integration. Then it'll only be an optional plug into a remote service. Then it'll only be an optional, but strongly recommended, dependency in other software. Then it'll only be a digitally signed third-party value that's mandatory. Then it'll only be something most installer won't proceed without.

We've been jumping from slippery slopes to slippery slopes over the past few years. It's tiring. And the coincidental timing of all this is not helping.