Relaxation time is not a defect (breakage) but an attribute of substrates. A claim that implementation is dependent on reliable substrates, is essentially the trilemma and its conclusion that introduces covariant substrate independence. Implementation requires >= 1. I would not confuse this with computer program portability. Not the subject matter, even if it is a good source of first intuition. I would recommend the sources I reference as very good readings on the subject if you’re interested. Definitely more tested and accepted than mine. Anderson and Piccinini also has a very good introduction and probably the most advanced treatment.