I use it and see it many times per month as it’s the preferred way of sticking graphics and diagrams in markdown in git repos and generated static sites.

It’s so handy for putting a sequence diagram in your docs and then tracking the changes over time using git.

I’m curious what other software developers use if not this. I’ve tried specific graph and drawing tools like lucid and Visio, but the simplicity of mermaid is nice. And I don’t know anything else that shows git blame for who changed what in my diagram, when.