systemd introduced optional timers. Not long time passed and voila - cron is deprecated and hardly works today. systemd introduced optional socket activation.

systemd introduced optional timers. Not long time passed and voila - cron is deprecated and hardly works today. systemd introduced optional socket activation. Boom: sshd in process list is faked on Ubuntu 22+. systemd introduced optional structured logging. Voila: every distro now ships with unremovable journald. systemd brand introduced optional systemd-resolved, easily the worst project, and soon it's going to be mandatory for DNS resolution. Whatever systemd makes optional, practically becomes mandatory to use in distros because systemd developers do not code optional things for them to go unnoticed.