I suppose there might be in a very technical sense; but most of what I'm thinking of is PDFs that they have provided online at one time or another for consumer download but are maybe not readily available anymore.

An example would be the 5th Element setup instructions for a Yeti ASX. I happen to have the PDF because I downloaded it three years ago. But since they are now using the Fox DHX, I guess they felt no need to still make it available. If there were somewhere to warehouse such things, I would post it.