I think the old binaries can be patched for new iOS. Or new binaries can be patched for custom backup locations. Or perhaps the open source libimobiledevice [1]

I think the old binaries can be patched for new iOS. Or new binaries can be patched for custom backup locations. Or perhaps the open source libimobiledevice [1] can be used somehow. In any case, requiring passcode might be a good permanent solution after all.