Yeah but the Genesis mini that came out a couple years ago had a cartridge slot in conjunction with pre installed Sega games, and you cant buy those very easily. It would have without a doubt driven the price of NES carts up higher than they already are, but it still would have been a smart move to make an official competitor to the Retron's. This seems short sighted to only have 30 of the most common NES games locked to a system and no ability to upgrade it via Virtual Console or to add your own carts.
I feel like i am the audience for a move like this from Nintendo, but with the way it is being handled has me little interested when i can play most of those games in HD on the Virtual Console, or just play my cartridges in blurry 240i. This really could have been so cool if it just had a slot, or if they had just gone the extra mile and made a full on official 3 in 1 NES/SNES/64 box. That would have been dope.