What are the obstacles to fixing this functionality? It seems to me like there should be sufficient demand for this feature to justify the cost of fixing it. The fact that it has been broken for so long suggests that there must be more obstacles to fixing it than just the technical issues.
I have friend with a PhD in history, who has written several books. I haven't seen them, but I believe they include substantive documentation to standards of modern historical research and include figures and tables to make it easier for people to read and understand. One in particular is a history of w:Robert Campbell (frontiersman)#Sublette and Campbell (1836–1845). He thinks the w:Campbell House Museum in St. Louis might like to sell his book as a fund raiser. He claims there is another "Campbell House Museum" in Northern Ireland, where the said Robert Campbell was born.
I've suggested he consider publishing his books on Wikibooks, where other scholars could potentially improve them.
However, an obstacle to that is how it could be converted into a PDF and printed. A PDF could be distributed via web sites associated with both Campbell House Museums and other interested organizations. A physical book could be sold to raise money for the museums.
I have other projects for which I'd like to be able to create PDF documents potentially from multiple articles with flexible options for font size, headers and footers.