You might ask, "Why not just use the latest USSEP?" The answer lies in dependency. The USSEP is version-locked to the game executable (SkyrimSE.exe). A USSEP built for game version 1.6.640 (AE) will crash if used with game version 1.5.97.
Example: How a Specific Fix Is Documented Unofficial Skyrim Special Edition Patch 1.5.97
One of the most significant aspects of USSEP 1.5.97 is its scope. The patch addresses a wide range of issues, from minor tweaks to major overhauls. It fixes quests, improves game stability, and even makes adjustments to the game's mechanics to make them more balanced and enjoyable. This level of detail and care is a hallmark of the community's commitment to the game and its players. You might ask, "Why not just use the latest USSEP