Your information is out of date with respect to systemd-udevd, per https://news.ycombinator.com/item?id=10518933 https://news.ycombinator.com/item?id=10518933 a

Your information is out of date with respect to systemd-udevd, per https://news.ycombinator.com/item?id=10518933 https://news.ycombinator.com/item?id=10518933 and others; and your assertion about journald is simply wrong unless something has changed very recently.