What is functionality though? What is pizzaz? When are they the same and when are they different?
E.g. the famous Emeco 1006 chair, which won a contract to supply the US Navy by being thrown out a window and not breaking. It became a design classic, and now sells for $600 each. It gained a kind of following, which is in part based on this history. But is that durability especially functional for your home or restaurant environment which isn't on a warship? Do you think you're going to use your chair as a hammer some days? Or is fetishizing something used by the military and extreme durability its own form of pizzaz?
https://www.dwr.com/kitchen-dining-chairs-benches/1006-navy-... https://www.emeco.net/variants/emeco-1006-navy-chair-brushed... https://99percentinvisible.org/episode/77-steps/