Ask HN: What tools/editors do you use for technical architecture diagrams?

I'm a career programmer who recently moved to a "solution architect" role, and I need to present/describe technical systems architecture to various stakeholders and non-technical people. I would like these to be detailed enough (or have 2 versions) so that I can share them with people in the field doing the actual development, devops etc and highlight details about AWS deployments, API endpoints, flow of data/payloads between data centers etc. I've had no formal training with Visio or anything like that and so far have used MS Word (or similar) with boxes, text and arrows. Any suggestions from HN?