Scala wrapper for Java NIO (github.com)

I have a (genuine) question about this, as I'm interested. What is the benefit to supporting so many ways to instantiate a File object:

    val f = File("/User/johndoe/Documents")
    val f1: File = file"/User/johndoe/Documents"
    val f2: File = root / "User" / "johndoe" / "Documents"
    val f3: File = home / "Documents"
    val f4: File = new java.io.File("/User/johndoe/Documents")
    val f5: File = "/User" / "johndoe" / "Documents"
    val f6: File = "/User/johndoe/Documents".toFile
    val f7: File = root / "User" / "johndoe" / "Documents" / "presentations" / `..`

Why not just the first one, and string interpolation/composition if you need 'root' or 'home' ?