Interesting. This one looks more powerful than most attempts I've seen.

One of my key questions is addressed in the FAQ:

Hard link or symlink? What about a Mo2 style vfs?

• They all achieve the same goal but each comes with downsides
• Hard links can be loaded fast and take up no space, However when the source file is removed the hard link is removed which can cause issues. The hard linked file must also be on the same drive as the source file. They also look like normal files and report as taking up space which can cause confusion
• Symlinks can be created between drives and are distinguishable from normal files. Removing the source file stops the symlink from working but the symlinked file still shows as a symlink and can be easily removed. The downside of these are they much worse than hard links when playing with large modlists as they take longer to load. The manager allows you to freely swap between both methods and symlinks may be fine for smaller modlists.
• Mo2 style vfs (FUSE and overlayfs): These have the benefit of not moving any files to the game directory. I have added both of these to a test build, Neither provided any real benefit over hardlink/symlink and caused more issues than it was worth.

https://github.com/ChrisDKN/Amethyst-Mod-Manager/wiki