I'm always amazed at what systemd can do that I don't know about. I had no idea about timesyncd. How did anyone find out about it? Is there a super awesome book

I'm always amazed at what systemd can do that I don't know about. I had no idea about timesyncd. How did anyone find out about it? Is there a super awesome book or video of systemd "hacks" that I can read or watch? I think I've read the official docs but I don't think I really learned anything, but that was a couple of years ago. Edit: Wow, just realized that my debian laptop is running timesyncd. I run the same debian version on all my servers too but I installed ntpd on them. I guess I need to check how their conflicting, if any...