Ethereum still has it's gas fees issue for regular traders, yes it has it's layer2s on top, but what is the point of converting to matic or ArbitrumOne etc if it costs a small fortune to get it on the chain in the first place?
If Solana can solve it's downtime issues and Cardano can get its functionality and Dapps to market on time, either (or even both) can still take a large market share from Ethereum.