The Fatdog64-900 Final release, launched on September 12, 2023, marks the introduction of the 900 series based on Linux From Scratch (LFS) 11.3, a significant upgrade from the LFS 8.2 in the previous 800 series. This release includes over 2400 packages, with the possibility of more additions in the future. Users upgrading from earlier versions are advised to replace vmlinuz and initrd, but savefiles and savefolders are generally not upgradable, necessitating new ones for each release. Users transitioning from older Fatdog series (700 or 600) to 900 should consult the provided forum thread for specific notes and warnings. Compatibility issues may arise with older packages, especially those dependent on openssl 1.0.x, but a "openssl-compat" package is available for limited support.