I've used asciidoctor with it's diagram plugin (https://asciidoctor.org/docs/asciidoctor-diagram/ https://asciidoctor.org/docs/asciidoctor-diagram/) internally

I've used asciidoctor with it's diagram plugin (https://asciidoctor.org/docs/asciidoctor-diagram/ https://asciidoctor.org/docs/asciidoctor-diagram/) internally on memos/draft documentation, which that gives us an ability to actually just check in the asciidoc with diagram source into git. Then we use merge requests for a real review process. Then, I just usually just export to pdf or word for broader sharing among the masses. (Amazing how this usually gets far more attention than Confluence, etc) Main benefit is that most of these kinds of CLI diagram tools have much longer lives than any GUI-based diagram software I've used. But even just having a separate "diagram source" file where you just check in an image is still nice. Then you don't have to bother with wondering who has access to the tools, etc.