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. Large OP_RETURN increases the risk of CSAM because it makes easier to add large data / jpegs via the network and not only directly via miners who a liable when they directly add data.