Every node runner should decide the correct OP_RETURN size for their node. I have configured my node with datacarriersize=100000 because I want to get the most complete picture of the mempool possible so that when I create a transaction my fee estimation is as accurate as possible. I would argue that datacarriersize=0 is a poor choice because it breaks Lightning and Samourai Whirlpool but that is a choice for every node runner to make.