The real litmus is simple: if the tool goes away, does the work stop?Take away version control, CI tools, regression testing? Yeah, we're in weeds pretty quickly but maybe not immediately. Take away the issue tracker? Red alert.Editors and compilers go away? R-studio, Excel, Illustrator if those are your creative tools? Dead stop. Bird hitting a window dead.Trello's down? No Asana? Enh, we'll be fine for a few days. A week or two. Or three.When Slack's down people are relieved.