This is likely because PDF became the “file that everyone can open”, just in their web browser. It’s the next best thing to a web page for non-techie consumption. Yes, there’s no reason people can’t open pptx in most cases, but I bet various endpoint protection and just not understanding how to even pick the right program to open the file steps in.

Well, if your KPI is how much you use an LLM like in some reports - this is an easy way to get those good indicators. Also, LLMs are super easy to use to parse things, whereas many special programs like IDK grep isn’t exactly user friendly. Not to mention not finding patterns really. Though here I’m thinking things like looking at various logs on computers.