ASCIIFlow Diagram Tool
The problem with visual diagramming tools as far back as Visio, is how much of a time suck they are even for simple diagrams. If you're one of those folks who manages to stick with one long enough to create a stable of templates for common diagrams, you can become somewhat more efficient, but it's always going to be fiddly.<p>I've embraced the diagrams-as-code world, with graphviz, plantuml, Structurizr DSL, AsciiDoctor Diagram, Mermaid, and WebSequenceDiagrams all having a place. It's even possible to generate SVG using ruby or any language with a decent SVG library.<p>Yes, I had to give up making my diagrams "just so", but the time I've saved not dragging around elements, trying to connect lines and arrows makes it worth it. Being able to commit them to source control as text rather than binary files that don't diff is a bonus