Edition's End - What to do with this stuff?

Warhammer 40,000 - Soon a new edition of 40K will completely replace everything you own. Let that sink in for a second. EVERYTHING. Something like this hasn't happened since the change from second to third edition. Crazier still is the sheer amount of content that came out during 7th edition, between the multiple codexes for most armies the warzone books and the gathering storm books I think I bought twelve books. Add to that the fact that I abandoned my Space Marines only pledge when the Genestealer Cult and Black Crusade books came out, now I'm sitting on a pile of psychic cards, strategy cards and other stuff that won't be usable in the new edition.

I know that I can probably repurpose some of the stuff and the books all have really good stories and background info, but it's a little over an entire shelf taken up by this stuff. I'm just not sure what to do with it as I'm sure 8th with probably have a plethora of stuff to replace it