Note to self about #online #diagrams and #charts:
1. [`excalidraw.com`](https://excalidraw.com/) for sleek hand-drawn diagrams (just a few shapes, but great UI)
1. [`app.diagrams.net`](https://app.diagrams.net/) for blocky, corporate-looking diagrams (plenty of clipart, bloated UI)
1. [`mermaid.live`](https://mermaid.live/) for auto generation of diagrams belonging to a handful of types (computing, engineering, business), similar to #Graphviz (very limited, but declarative and text-based)
1. [`asciiflow.com`](https://asciiflow.com/) for the lolz, basically