1. Legendary stability
Debian Stable releases every ~2 years. During that time packages get only security updates — zero breaking changes. For a server that needs to run 5+ years without major reboot, this is exactly what you want.
2. Largest package repository
~60,000 packages in main + contrib + non-free. Practically everything you need is already packaged and tested by the Debian team. No weird PPAs, no add-to-repository.
3. Zero-bloat philosophy
Minimal install starts at ~600 MB RAM. No snapd, no forced cloud-init, no flatpak. You decide what to install.
4. systemd + apt — solid combo
Clean systemd units, fast apt, robust dpkg. 30-second updates for security patches.
5. Non-corporate community
Debian is a Foundation, not corporate-owned. No overnight pricing changes like Red Hat (RHEL 9 source code closure). You don't wake up to CentOS Stream instead of CentOS stable.
Conclusion
At Cyber Immunity we run 50+ production servers on Debian Stable. Average uptime: 99.99% (with reboots only for quarterly kernel updates).