This is the comment I came to upvote and agree with. I am considered a Linux expert in my field but the truth is that I really don't know how systemd internals

This is the comment I came to upvote and agree with. I am considered a Linux expert in my field but the truth is that I really don't know how systemd internals work well enough to read that review and fully understand it. The review did teach me some things about what Units really are, more than just services and timers, but other than that it was too deep for me. And yet I work full time with Linux systems, building services on Linux systems for major clients and government contracts. From my perspective as a user and operator of Linux, systemd has been nothing but good things.