Plugin Files And You (ESM/ESL/ESP)

Beginning with Patch 1.5.3 of Skyrim Special Edition, the game supports a new type of mod file known as a "light plugin" with the .esl extension. Elminster has spent a considerable amount of time studying how this works and has had a number of community members aid in verifying this information. Since questions about new plugin types come up all the time, I felt it was best to make sure our source here is accurate. Flag Types Plugins can have 3 different flag types: ESP, ESM, and ESL.

I've read the whole thread after @alt3rn1ty linked it in the CBBE comments, where a discussion on this topic was going on. CBBE 1.5 includes an .esl to correct some vanilla clothing paths to apply the new edge lighting effect. My issue with Wrye Bash and .esl's is how they affect the save files, mainly. I'm just trying to understand what is going on and if there's a problem or if can just ignore it. I'm using Sharlikran's latest build at the moment, was using the latest from the second post in W