I understand that, but I don't agree that it makes sense to at all consider the "glory days" as indicative of the ceiling. As it isn't really relevant to discus

I understand that, but I don't agree that it makes sense to at all consider the "glory days" as indicative of the ceiling. As it isn't really relevant to discuss ceilings on quality in terms of exceptional circumstances. Just like how the "glory days" of many nations or many companies are when they're unsustainably burning resources for a short time for the sole purpose of glory. To me quality implies sustainability.