I think so; they're basically just some custom functionality around a filesystem image with all of the shared library dependencies and assets included, along with some wrapper functionality. Running appimages with `--appimage-help` shows what some of the available options are, including `--appimage-extract` to get all of the files installed.

That said, it's also probable that you can cut the size significantly by using `strip`; when you essentially statically link all of your dependencies, it turns out that there's quite a bit of low-hanging fruit with regards to eliminating dead code.

EDIT: trying this out, it looks like using `strip` actually corrupts the appimage and makes it unable to run. I guess there's something about the format that doesn't play nice with that, although I'm not sure exactly what.