All numbered cards, including high gloss and exclusives, are only found in hobby boxes for series 1/2. The reason being there is no set limit on retail production. They print them based on demand, and if you had numbered card sin them, there would be no way to space them out in retail.
Retail is limited to the basic inserts and canvas. Although apparently some French cards slipped into last year's retail. Retail can be great value though, especially on sale, as the basic YGs can hold a lot of value relative to the price of retail. UD also seems to be overprinting hobby. I've bought multiple hobby boxes that don't even have a "hobby" hit in them. The Exclusives seem to fall 2-3 per case now, and before they were almost 1 per box.