I have noticed a strange effect where as new technologies arrive to replace old ones, the old technologies become obsolete and we assume that the old technologi

I have noticed a strange effect where as new technologies arrive to replace old ones, the old technologies become obsolete and we assume that the old technologies never existed in the first place. For example, we now have the internet and can search for information online, so we imagine that pre-internet people had no access to information. But this is simply not true. There were libraries, bookshops, letters, conferences and workshops, and a whole infrastructure around knowledge-sharing which has now become obsolete.