Yes, the compromised Core devs banned Core V30 because of the critical bug that deletes wallets and all Bitcoin.
But their reckless change of OP_RETURN from 80 Bytes to 100 000 Bytes does have an effect on the network.
https://i.postimg.cc/ry5BtPNZ/Nick%20Szabo%20OG%20Cypherpunk.png
Large OP_RETURN...