I just imagine a federated, YouTube-like platform. Except better in literally every single way. You are a member of your local community instance, and thereby connected with every other federated instance throughout the world.

PDFxchange is hands down the best PDF UI I’ve used. I switched from Acrobat a year ago expecting to be disappointed, but haven’t had any issues. The ability to customize almost everything about the software was what sold me and I’ll never be able to go back to the horrible experience of Acrobat.