The plumbing layer as the new kernel

According to that link, certain packages include systemd unit files, and systemd is able to deal with traditional init scripts. However, Gentoo's init system should be capable of generating systemd unit files which include functionality that systemd can't extract from traditional init scripts.

My point is that Gentoo should be able to offer packages additional init functionality in the case that they are being run under systemd (or anything sufficiently capable) without needing anything in the package particular to systemd. This would reduce the burden of having multiple enhanced init implementations on maintainers of packages which provide services.