We have become aware we should ideally replace eudev with a minimal udev build from systemd instead, similar to what some other distros are doing.
eudev, a gentoo fork of udev, is unmaintained. Gentoo has move to eudev.
Prior art in gentoo is the systemd-utils package which amongst other bits, builds a standalone udev from systemd: https://packages.gentoo.org/packages/sys-apps/systemd-utils.