Why Are There So Many Layer2 Solutions, Yet Nobody Uses Them?

On-chain scaling is not a "new" problem. As early as 2017, the problems of Ethereum and Bitcoin congestion and inability to meet user demand had already become apparent. Since then, development teams have successively proposed corresponding solutions, but the subsequent bear market reduced people's trading enthusiasm, and these solutions faded from investors' sight. Until May this year, with the explosion of liquidity mining and Uniswap, people rediscovered that: Gas prices skyrocketed to 500 Gwei, with over 140,000 unconfirmed transactions.