My question is about your product. It's about export from Paperpile. I too want the focus to be on a better product, and I hope not to move away. And a better product means having a good export. You gain customer trust this way.
However, Mendeley got bought out as did Papers, with Papers being pretty rubbish now. Endnote used to be the standard in academia, now younger researchers hardly use it. People are increasingly dissatisfied with Evernote. For an undergraduate the long-term usage of Paperpile may not matter. For academics it's rather different. We need to be sure we can get our data out, and that's what makes Paperpile even better: there's no guarantee your product will be around in ten years time.
So my original question still stands, and it's very much a question about your product. If you are offering RIS export anyway, and given that just about all other reference managers use RIS, can it not be implemented in such a way that the attachments are with the RIS file? This is what Zotero does so it must be possible. It just means that if you go bust or your product goes bad, or you have a buy out, then our data is readily available, both the bibliographic references and the PDF attachments.
The fact that I'm coming to Paperpile from Zotero, and deciding between you and Bookends for long-term use, as I'm sure many of your customers are, should indicate that many of your customers would like Paperpile to offer a good export option.
The alternative is to have to re-attach thousands of PDFs manually to each record and this very much is not a good export option.