What is used more often now: init or systemd?

In modern Linux distributions, systemd is more commonly used as the init system and service manager. It replaced traditional init systems (SysVinit, Upstart) due to faster boot times, parallel service startup, convenient dependency management, and extended monitoring capabilities.

Init systems can still be used in some lightweight or specialized distributions, but systemd has become the de facto standard for most popular systems such as Ubuntu, Fedora, Debian, and others.