Didn't do much research around this lately.
Today I revived my SSD (we'll see) and therefore fell over systemd when I edited grub.conf Where would/should I put stuff from /etc/local.d/ with systemd? I have some commands there setting parameters for ssd-usage and those would be skipped (not executed) with systemd. Pls don't misunderstand, this is not gentoo ricer stuff, I am quite happy w/ openrc, especially w/ the ssd. Stefan