Interesting points, Gary. I have some comments on them.
As far as oil-based inks, iron gall ink when used in early printing was combined with linseed oil and resins. Gutenberg, for example, used boiled linseed and walnut oils as well as turpentine and resins. I have no idea how the papers were treated, however. It was most likely made from rags, though, since wood pulp paper wasn't used until early 1800s. Some inks, particularly "India," are made from carbonized (burnt) vegetable oils. Some also used fish oil, "lamp" oil (mineral,) and/or gelatin. The amount of oil required in those situations is very small. Most printing inks these days are oil based, but I'm pretty sure it's soya oil, not linseed.
As for acrylics, there are several reasons I don't use acrylic primers or mediums on paper. I reason if I'm going to coat the surface with a primer, it might as well be on canvas or wood. A primer would elliminate any benefit paper would offer me, except for maybe being cheap. Oils don't adhere as well to acrylics as they would to gelatin or shellac. The acrylic polymer also shrinks as it dries, which can cause problems with lighter weight papers, and cause even heavy weight paper to bend. You could weaken it by diluting it with water, but that would introduce buckling problems. Shellac doesn't shrink or use water, and offers better adhesion for oils. It's probably about the same price as acrylics, unless you get a cheaper brand, which I wouldn't like to use.
There are also synthetic papers that can be used for oils and don't require any preparations. The Yupo brand is just plastic film. Mylar will also work with oils. There's a brand from Multimedia Artboard that's paper mixed with epoxy, and works with oils extremely well.
http://yca.yupo.com/index.html
http://www.multimediaartboard.com/