Many people here are talking about buying an iPad and the pencil, but if all you’re doing is reading papers I think this is a massive overspend. There are many inexpensive android tablets that come with pencils plenty good enough for handwriting or non-artistic drawing.
Of course, you say you have a job so you’re likely not to need to buy the cheapest thing possible (even if you don’t, you’re not forced to buy an iPad, Samsung’s tablet software is quite good), but I don’t want someone with the same use case, who might just be a student, to get the impression they need to spend a grand to read pdfs.
I’m not sure I understand, epub is both the industry standard and an open format, as far as I know. Why not work on using it or build it around epub from the get-go?
I have to admit I’ll have to wait for the project to start implementing epub to consider getting on board, but it’s still a great effort.