It appears there is some confusion regarding the codename for Ubuntu 25.04. Initially, it was mentioned as "Lunar Lobster," but recent updates indicate that Ubuntu 25.04 is actually codenamed Plucky Puffin. Here are the key features of Ubuntu 25.04 (Plucky Puffin):

1. Performance Enhancements:

   • Compiler Optimizations: Ubuntu 25.04 uses -O3 compiler optimizations by default to improve execution speed across applications.

   • Linux Kernel 6.14: This version brings improved hardware support, energy efficiency, and security patches.

   • Toolchain Upgrades: Updates include GCC 14.2, Python 3.13, LLVM 19, and Go 1.23, enhancing build processes and runtime performance.

2. Wayland as the Default Display Server:

   • Wayland continues to be refined, aiming to resolve lingering Xorg compatibility issues and deliver smoother graphics rendering.

3. GNOME 48 Desktop Environment:

   • Features refined UI responsiveness, workflow improvements, and a more cohesive design language, including enhanced multitasking gestures.

4. Filesystem Innovations:

   • ZFS & Btrfs Optimizations: Continued experimentation with ZFS as a root filesystem option, offering advanced snapshot and compression capabilities. Btrfs also sees performance tweaks5.

   • Atomic Updates & Rollbacks: Inspired by NixOS, Ubuntu’s filesystem tools now support safer updates and rollbacks.

5. Snap & Flatpak Coexistence:

   • Snap Improvements: Faster and less intrusive background updates with streamlined manual updates.

   • Flatpak Support: The GNOME Software Center now includes Flatpak updates by default.

6. Installer Enhancements:

   • Improved dual-boot experience with better messaging about other OS presence and refined installation scenarios.

   • Out-of-the-box encryption options for dual-boot installs and improved handling of Windows BitLocker encryption scenarios.