We currently exclude a wealth of common file formats -- and as a result, ecosystems of knowledge.  How can we elevate the general priority of broadening supported formats? 

In the past year I've worked on projects generating public-domain csvs, and public-domain epubs, and each time found that there is no place in the wikiverse to store them (and no other community archive that is remotely as reliable and useful).  Each time I discover this, my mind actually goes blank for a moment in crogglement, and I seem to forget that it happened.  But today I retained coherence long enough to write this note.

Commons's list of Unsupported file types* says "help needed to support these" -- what help is needed, and how can we get there? Are all 40 of the formats listed still really unsupported?  

SJ