All this stuff does is slow down a thief to either give you time to get back to your bike to catch them before they make off with your stuff or make the would-be thief think twice and move on to an easier target.

Any lock can be cut if given enough time and the proper tools. If you can't keep your bike with you at all time and have to lock it up, all you can do is try to dissuade the opportunistic thief and seriously slow down a determined one.

Remove anything that's QR if you can and if you can't, then use a sturdy cable or other chain to tether down the QR parts the best you can and pray your stuff will still be there when you return.