During the early-to-mid 2010s, there was no hotter painter than Christopher Wool.  The Solomon R. Guggenheim Museum in New York filled its entire spiraling rotunda with the artist’s canvases in 2013. The exhibition was supported by major collectors including Tom Hill, Dan Sundheim, and Stefan Edlis.  Wool’s painting Apocalypse Now (1988), owned by hedge-fund manager David Ganek and included in the show’s earlier outing at the Art Institute of Chicago, never made it to the Guggenheim. Instead, it headed to Christie’s, where it sold for a whopping $26.5 million, a milestone reached by just a handful living artists. At the time, new works by Wool went for as much as…