I vaguely remember Linus finding some strong words when the systemd developers wanted to integrate dbus into the kernel. (IIRC, they claimed it offered better

I vaguely remember Linus finding some strong words when the systemd developers wanted to integrate dbus into the kernel. (IIRC, they claimed it offered better performance, Linus ran some benchmarks and claimed the kernel-dbus implementation performed worse than the regular dbus daemon. My memory on the subject is fairly vague, though, so don't take my word on it.)