ethereum still has the advantage to some extent because it is the most trusted and widely used smart contract platform, especially for DeFi and NFTs. but like you point out the high fees and slow transactions have kind of pushed many users to faster and cheaper blockchains like Solana, Polygon and other upcoming ones even TON & SUI are beginning to make some big steps in the ecosystem. well, the upgrades are kind of promising!! but if Ethereum does not scale quickly then it will give newer blockchains a chance to catch up on time. i think Ethereum will remain strong, but its dominance will be tested as the competition grows.