I agree, the article is very dismissive about losing technology. There's lots of ways we lose technology, from big cultural changes over time (Dark Ages) as well as more niche technologies or processes, like a "secret formula" that was protected until it was lost. The difference with technology is that often we can rediscover lost technologies by the web of understanding we have around it and other advancements in our recovery techniques.

For example, Roman concrete, that strengthens in sea water: https://news.mit.edu/2023/roman-concrete-durability-lime-cas...