AFAIK a fat binary is just a binary with all dependencies included. It would still be compiled for a specific platform. The magic part about this is that it's a single file compiled once that can be run on most platforms. And it also adheres to the format of a zip file, so you can add, modify and remove assets as you please inside the actual file, post compilation.
No, fat binaries are not binaries with all dependencies included. Fat binaries are executable files that contain equivalent compiled code for multiple architectures. Some also facilitate running binaries across different operating systems. More: https://en.wikipedia.org/wiki/Fat_binary
The idea also reminds me of (executable) self-extracting ZIP archives that were common once upon a time.
