Over the last decade — in outlets reaching from construction industry journals to the Boston Globe and the Economist; from CNN and Fast Company to Popular Mechanics; to Nautilus and TED talks — we’ve been hearing increasingly about mass timber and related phenomena: “CLT,” big wood, tall wood, tall timber, timber towers, ply-rises, plyscrapers, ply in the sky, super-ply, Brobdingnagian boards, and all manner of engineered arboreal futures.