As discussed on alpine-devel last year it would be nice to replace udev with some smaller in the next major release. By default we still use mdev these days, but you can’t run Xorg with mdev out of the box currently. The setup-xorg-base script automatically replaces the mdev service with udev.
I would appreciate it if we would switch to one of the udev alternatives discussed on the ML.
(from redmine: issue id 4985, created on 2016-01-03, closed on 2017-05-25)