Microsoft Windows 3.1. I remember the moment very well. We went from a focused instantaneous UI in DOS to a paradigm that most people cannot handle...multitask

Microsoft Windows 3.1. I remember the moment very well. We went from a focused instantaneous UI in DOS to a paradigm that most people cannot handle...multitasking. Some have mentioned density but DOS business applications weren't terribly dense. There was only so much screen area and we had conventions for how to use it. The apps would flow between screens much like modern Windows UI or mobile apps. The move to Windows presented users with a slow dense mess. My grandmother could set the screen on fire using Lotus 123 keyboard commands and bang out financial statements all day long. I was maintaining Lotus on her machine for decades after the Windows switch so she could use her keyboard and get shit done. Quicken was awesome on DOS. We ran our bookkeeping business on Lotus 123 and Quicken for years (1980s-1990s). Productivity crashed after that and never recovered.