The article claims that sequence charts are the only useful thing in UML. What about:
Entity diagrams, especially for database ERD
Timing diagrams (think: Gantt)
Interaction/flow diagrams
Use case diagrams
Entity diagrams, especially for database ERD
Timing diagrams (think: Gantt)
Interaction/flow diagrams
Use case diagrams
XEARTH is also pretty neat, if you don't want to bring in a full mapping API just to show a point on a map. I realize it's a pretty crappy map in XEARTH, but the point is, I don't always need a good map.
Mermaid's nice though. I love the git graph - I use that thing every day. If I'm not dealing with ITAR data I just render everything remote through the kroki service, and take what I need from each graph spec.
Meanwhile, sequence diagrams map very well from the text description.