dev-libs/libgudev-238-r1 depends on virtual/libudev[sticky-tags(+),...] sticky-tags USE flag in virtual/libudev cannot co-exist with eudev USE flag in virtual/libudev. Thus, libgudev requires systemd. I thought the point of gentoo was freedom of choice. libgudev is required by sys-fs/udisks which I can't remove if I want kde GUI applications. This blocks system update. Reproducible: Always
You can blame the eudev project for failing to maintain parity with udev.
Also it does not require you to run systemd, systemd-utils[udev] is just udev intended for use with openrc (aka essentially the same as eudev, just not forked). eudev was formerly meant to rebase on upstream udev to maintain parity, but that just hasn't been happening anymore. Requirement will be dropped if eudev is fixed anyhow.
*** Bug 913900 has been marked as a duplicate of this bug. ***
*** Bug 913954 has been marked as a duplicate of this bug. ***