Compatibility is a very, dirty word which encompasses all sorts of meaning to all sorts of people. Here I will attempt to describe its various meanings like a spectrum, and what exactly will happen if ZoFE 3.0 is used with X mod. This is my spectrum of compatibility:

• Recommended: These mods are recommended!
  
  
• Compatible: These mods work well together, since I play them myself.
  
  
• Fine: These mods don’t interact with each other in any meaningful way, and largely function independently of each other.
  
  
• Polish: There may be duplicate buildings, coloured boxes, technologies that do the same thing, feature or design clash. You can still play these together if polish isn’t a major concern. A patch may be considered for a smoother experience.
  
  
• Requires Patch: These mods unfortunately overwrite the same files, and require a compatibility patch to take into account both values.
  
  
• Incompatible: Expect crashes to desktop.

Please note that 'Compatible' and 'Supported' require personal testing experience playing through Stellaris, which I rarely have time to do these days. So the highest you can get is probably 'Unsupported' which is actually not that bad.

Care has been taken to minimize instances of ‘Incompatible’ and ‘Requires Patch’ during the design and creation of the Zenith of Fallen Empires 3.0 base mod, and it is always a trade-off between adding more features or more compatibility. To further increase compatibility, content that may have additional compatibility issues have been put into their own submod, which is also how 2.0 dealt with the issue of compatibility. Of course, 100% compatibility will mean a mod with no gameplay features :D. Still, I hope the end result will be an acceptable trade-off for most.

• Have to redo this list.
  

Feel free to request information of mod compatibility or submit reports of your findings below, and I will do my best to describe them with the above spectrum.