"Are there any real counter examples, where old techniques haven't been met or surpassed?" Damascus Steel comes to mind, and maybe Starlite. https://en.wikip

"Are there any real counter examples, where old techniques haven't been met or surpassed?" Damascus Steel comes to mind, and maybe Starlite. https://en.wikipedia.org/wiki/Damascus_steel https://en.wikipedia.org/wiki/Damascus_steel https://en.wikipedia.org/wiki/Starlite https://en.wikipedia.org/wiki/Starlite There are objects of which we currently don't know how they were made, so the technique was lost. However, this also can be attributed to archeologists not being engineers.