General Appraisal / Linux over the ages / Linux+systemd

Thanks for nice words and glad this is helpful to you. LFS211 covers systemd in more detail and it permeates all of our classes. In a lot of ways it makes life simpler as most things look the same now on all distros (and I'm not going to get caught up in holy wars made difficult by not easy to deal with people on all ends.) But as systemd keeps expanding its sphere of influence and taking over many things not directly involved with "init" it becomes difficult to keep up. We have been diminishing anything that refers to old distros as it makes it more difficult to see best practices and complicates things in a way most students just don't need. Likewise, as network manager evolves we can get away most of the time from dealing at a low level with files in /etc which vary a lot. It is also why we avoid distro-specific methods -- like "snap" and "netplan" on Ubuntu when we can get away with it as other distros are just not interested and so I suspect atrophy will come, but one never knows.