You’ve drafted your email message, hit send, and have moved on to other tasks (probably more email, but whatever). Then you get an email back — “Was there supposed to be an attachment?” or “Email rejected due to large size” or “I couldn’t open the link you sent, can you send it
It’s great being able to download papers in PDF format, especially since many publishers are scanning their older journal collections into electronic format. Storage space is no longer an issue, which means that hackademics are prone to saving huge numbers of PDF files, sometimes multiple times each. Even if there aren’t multiple