There are pros and cons. As categories, both food photography and product photography overlap considerably with still lifes. Many shots in the food thread that was moved into the forum aren't commercial shots at all. They're photos of someone's quick lunch or holiday dinner. Similarly for shots of nonedible objects now in B/W & Still Lifes that could go into a combined Food & Product forum. How would you select images to move?
Combining food and nonfood would create a better balance. The new Food forum is so pitifully underpopulated that I started a "Post your _____" thread there to get things going, although I had just one photo for it and not a very good one at that.
All this is just my opinion--or, rather, a subset of my opinions.