The presentation was minimal, included some code snippets and was super easy to follow. Appears that it was put together all in Markdown, using a very popular open source tool (which I was not aware of): sli.dev. Highly recommend it for folks who make technical presentations.
p.s in the same space, someone also recommended https://revealjs.com/
I’ll check out sli.dev, I’ve been using Reveal.js for years now and highly recommend, I love how hugely customizable that is, but one issue for perfectionists is that it’s relatively hard to perfectly convert to a PDF, these days I use DeckTape that does a decent job. I used to be one of those nerds that used LaTeX (Beamer) but fell out of love with it.