OpenAI's Codex just shipped a feature called Sites, and it changes the default format for knowledge work output. Static decks, memos, and reports now have a direct competitor: living, shareable, interactive links that update in place and do things a flat PDF cannot.
The AI Daily Brief host NLW walks through more than 10 concrete examples of work artifacts, proposals, training materials, spreadsheets, and more, rebuilt as interactive web outputs instead of attachments. The argument is not aesthetic. It is functional: links can be updated after sending, can embed live data, and can respond to user input in ways no PowerPoint slide ever will.
The piece is worth reading in full for the specific use cases and the framing around when a static document is actually the wrong tool. The Codex Sites release is the technical hook, but the real question being asked is whether knowledge workers have been shipping the wrong file format for decades.
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