>>The strongest demand for tiny desktops has come from businesses and it's here where mini-desktops have advantages over all-in-one PCs which do tend to sell better to consumers rather than businesses. End customers are ordering through one of Intels OEMs, 20,000, 40,000, 60,000 units at a time going in to refresh some of their desktops.
Even if mini-desktop sales grow to 1.5 million units in 2014, that's still just a tiny piece of the market. Gartner's latest numbers suggest that about 268.5 million desktops and laptops were sold in 2013, down about 41 million units from 2012.<<
I believe you nailed it. Slow support for the NUC can be frustrating but in terms of units out there the NUC is still small potatoes. If sales moved from the tens of thousands into the millions there would likely be more resources put behind it.