Can't help but wonder if this was motivated in part by people feeding papers into LLMs for summary, search, or review. PDF is awful for LLMs. You're effectively pigeonholed into using (PAYING for) Adobe's proprietary app and models which barely hold a candle to Gemini or Claude. There are PDF-to-text converters, but they often munge up the formatting.

Not sure when you last tried, but Gemini, Claude, and ChatGPT have all supported pretty effective PDF input for quite a while.