Slim and Systemd

I just want to drop in a warning from Arch linux documentation:

Warning: Currently SLiM is not fully compatible with Systemd, resulting in
various problems on a second login. See Display manager#Incompatibility with
systemd for an outline of these problems.

I had really experienced such kind of issues after switching from OpenRC to Systemd! Text artifacts in GTK-based applications, SSH keyring issues, system stall on reboot or shutdown is not full list of bugs I got with Slim running under Systemd. All of a sudden I see the Arch docs. Replacing Slim with LightDM fixed all of these issues at a time!