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https://news.ycombinator.com/newsguidelines.html

https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...

I would disagree. Figma Slides got maybe the most positive response at the keynote. Most designers I know already use Figma for slides, so to make a first party experience with speaker notes and good UX would be understandably very popular.