https://chimera-linux.org/https://chimera-linux.org/docs/faq#what-is-the-projects-take...
Is going a really interesting direction with it's service management and login / seat management.
Fwiw, I think it's author also has a more gounded perspective on systemd then many others.
For Chimera the main issue is systemd's high volume use of gnulibc and gcc extensions, which is a porabiluty issue for Chimera which uses a LLVM toolchain and musl libc (and a bunch of really cool hardening and compiler engineering)