Anybody that was around for the Windows 95-ME era remembers. Things would just randomly crash. BSODs, "This program has performed an illegal operation", "A device attached to the system is not functioning", "Windows will restart and repair your registry", "Explorer has caused an error"... Ctrl+S was the first keyboard shortcut every schoolchild learned so that Word wouldn't munge their homework.

Let's not even think about the absolute mess that the web was with competing browser box models and DHTML and weird shared hosting CGI setups. We have it easy.