Well, I'm in CE, which you will find is a different animal than PE. I currently have 12 Tribal Squares producing 60 non-plunderable goods per day. They take up 144 tiles. Of the 3 CE goods that I am boosted in, the smallest building is 6x4, or 24 tiles. So I could fit 6 in the space that I have the Tribal Squares. Oh, but wait, they require 2 lane roads, so maybe only 4. So that's somewhere between 80-120 plunderable goods. There's more. With the Tribal Squares, I have 12 of each good per day. No fussing with finding trades to even out the inventory. If I want to get all 3 of the goods I've got boosts for, production would fall to about the same level as the Tribal Squares due to building size. And I still have to trade to get the other 2 goods. And they're susceptible to plundering. And the Tribal Squares help enable me to fufill 4 recurring coin quests per day, which has the potential for even more goods, which are enhanced by my Chateau Frontenac. So in my case it is hands down better to use the Tribal Squares instead of regular CE goods buildings. By the way, I didn't even get into the need for unrefined goods, which you haven't run into yet. That starts in Modern Era. So, if you don't have the goods GBs to produce the unrefined goods, guess what? You have to build lower era goods buildings (assuming you have the right boosts and don't have to trade for them) just to produce your current era goods.