The problem is miners will be creating another coin called ETG that will continue to use POW instead of ethereum.
I have heard this rumour in so many places.
Why create a new chain to preserve PoW, when miners could simply migrate to Ethereum Classic altogether? As far as I'm aware, ETC will to continue to rely on PoW over the course of its lifetime. Once ETH becomes a full-fledged PoS cryptocurrency, miners will be forced to move on to another chain. There's no other way around. Unless they decide to become a validator, that would be another story. What matters here is the long-term scalability of the Ethereum blockchain. Reducing fees is a must for ETH to grow in mainstream adoption. "De-Fi" cannot work as intended with high fees and slow transaction processing times in play. EIP-1559 is a temporary fix for the ever-increasing fees on the ETH blockchain. Things will get better with the ETH 2.0 upgrade and Sharding. Miners have no other choice but to approve the EIP or be left out of the game. It's as simple as that.
Nonetheless, the crypto/Blockchain space is full of greedy miners looking to "milk" rewards whenever they see fit. They don't care about users or the level of mainstream adoption of an underlying blockchain network. As long as there's money to be made, nothing else matters. Thanks to the decentralized and democratic nature of Blockchain tech, everyone has a voice in determining the future of the underlying cryptocurrency project. Whatever happens after the upgrade, Ethereum will be here to stay. Just my opinion