Not just a horrible track record, but the current state is also bad. I have a pretty recent Debian install on a bog standard Lenovo which otherwise runs Linux beautifully. It took days of fiddling with conf files and trying things out to get Suspend and Hibernation to work in a sensible way. The kernel, systemd and Gnome all try to do stuff, but they can't seem to agree on who's responsible for what part of power management. This is something that should work out of the box.