Having worked in a few IT architecture departments at huge companies the most popular tool by far at these companies really shocked me at first: PowerPoint. It'

Having worked in a few IT architecture departments at huge companies the most popular tool by far at these companies really shocked me at first: PowerPoint. It's not that hard to build these things by hand using basic shapes. One of our diagrams was about 3 feet by 4 feet when printed and had thousands of elements and lines connecting those elements. Similarly now that I don't use Windows I've reverted to Google Slides.