De addition of Mermaid diagrams is a great thing for the content area but it lacks one big feature... You can't click on anything inside of the diagram to establish a link with it's content.
One practical example would be:
You ask Cerebro to make a downward hierarchy about the current thought represented in a mindmap structure x levels deep (deeper than what you can see at this point). By adding the possibility to click on either mindmap node (Cerebro created) and go to that node/thought in your brain instantly you would have added (in no time) a visual summary of that part of the brain that you can use to navigate your brain more fluidly.
This is just one application and I'm sure you can come up with a 1000 more... if you can vote for it!

Regards
Jean-Marc