[toast0]

The difference is mostly in the track record of the people behind the effort.

DNS software in general has left behind a trail of security vulnerabilities. The systemd team has also left behind a trail of security vulnerabilities. I don't want a team who isn't focused on security to replace something security critical when the existing software seemed fine enough.

On the other hand, the OpenBSD team consistently delivers on small, focused utilities, built with security in mind that usually reduce the scope of the utility to the minimum required.