Sources:

• https://tes5edit.github.io/whatsnew.html -> Load order handling
• https://afkmods.com/index.php?/topic/5079-plugin-files-and-you-esmeslesp/&do=findComment&comment=174631
• https://tes5edit.github.io/docs/9-appendix.html#s_9-2
• https://www.creationkit.com/fallout4/index.php?title=Data_File
• https://afkmods.com/index.php?/topic/5079-plugin-files-and-you-esmeslesp/&tab=comments#comment-169297
• https://github.com/loot/loot.github.io/blob/master/docs/help/Introduction-To-Load-Orders.html

Points to verify:

I don't recall if anyone tested the .esm handling with anything other than SSE and FO4. It would probably be safe to assume that the older games handle the .esm extension the same way SSE and FO4 do though.

TODOS:

• Wrye Bash should not allow enabling 254 non-ESL mods because occupying the FE slot will cause corruption during gameplay. That slot is now reserved for the use of ESL flagged files in SSE and FO4.
• Creation Club files. The order of these is specified by the *.ccc file for each game. If that file is missing then it falls back on a hardcoded list. -> add this hardcoding to bash -> moved to Load order handling fixups and enhancements #309
• revisit master/children warnings - add a big fat one for esm or esl flagged files that have an esp as master -> moved to Load order handling fixups and enhancements #309

@Arthmoor - did I get those right?