Bitcoin is decentralized so it depends the number the nodes that run the malicious core V30.
We see that many Bitcoin node runners do not agree with it and already run Bitcoin Knots. Others won't upgrade to it and will stay on V29 or V28.
We will see. But essentiall the more nodes filter non-monetary transactions the harder it will be for the spammers to put their spam on-chain.
I am not sure if you are aware of the reasons behind the change but here are some sources.