In the '90's, I worked as a software/systems engineer "upgrading" factory process lines (think 100 year-old paper mills, plasctic bottle processing, pharma) fro

In the '90's, I worked as a software/systems engineer "upgrading" factory process lines (think 100 year-old paper mills, plasctic bottle processing, pharma) from big old buttons and knobs to industrial touch screens. It was a Disaster! Things that operators used to do in a few twists and pushes now required toggling between multiple screens. Small on-screen touch buttons that were the perfect size for computer nerd fingers were way too small for the big meaty fingers of the operators. Conveyor speed feedback that looked steady on an analog meter now looked unstable on a digital display with three decimal places of (un-needed) precision. I should do consulting for these car companies. I could tell them that a volume control should always be a physical manual device. :-)