I think the more important thing than fee of smart contract platform is the cycle of bull season because bull season will triggered the user of AMM will increasing. Although the fee of Solana is near zero with highest TPS, but if the trend of market on bearish, the price will down and many user will left the market. Solana blockchain can be solution for high fee transaction and network congestion but this project and need long time to be top of smart contract platform because BSC and ETH also keep on development to be better.