In the 1990s I attended a technical high school. We did technical drawing by hand (and by square) until the fourth year, and then we switched to CAD, mainly bec

In the 1990s I attended a technical high school. We did technical drawing by hand (and by square) until the fourth year, and then we switched to CAD, mainly because the school had purchased a good number of computers with intel i386 and i486 processors--there was some competition to use 486s, let me tell you. CAD was also starting to become popular among architects and professional engineers; for the new generation it was the tool of choice, while for the older generation it was a tool to be skeptical about. Drawing by hand when CAD is available is a waste of time. It is just that the "old" professionals, genius or not, do not want to learn the new technology and look for any foothold that can justify their staying in the technological past.