Yeah, 'cos scripts only exist on linux,,,
Yeah, 'cos I claimed that they do,,,
you can always roll back if you have the 1.7.3 pack somewhere on your computer.
Exactly. This just makes that easier. You can name the "pack"s and it's one command to make it, and one command to put it back. And you can pack up mods and stuff.
It's also got other useful stuff like adjusting the memory usage cap, tuning the garbage collector for multi-core processors, updating lwjgl, skipping minecraft.net authentication, and backing up saves