Videos were very instructive back then too. At some point, we started to prioritize form over function. E.g. https://www.youtube.com/watch?v=yYAw79386WI https

Videos were very instructive back then too. At some point, we started to prioritize form over function. E.g. https://www.youtube.com/watch?v=yYAw79386WI https://www.youtube.com/watch?v=yYAw79386WI [Around The Corner - How Differential Steering Works (1937)]