It's already dead. Apple removed all mention of it from the main page back in 2012. I'm sure the only reason it's still available through the support pages is so people have something to sync their bookmarks to.
It seems Safari for Windows was made available to help create web-clips designed for iOS, or rather iPhone OS back in the days when the iPhone 1 was just released.
That "cause" plus some internet-bashing helped Apple quite Safari for Windows.
You cannot download Safari through Apple Software Update for Windows for some time now.