Apillion have released their Embedded Wallet Service which removes the need for saving mnemonics and keys. Users only need to create a passkey with their mail. This is now available for EVM-compatible Substrate chains, with support for Substrate coming soon. https://x.com/Apillon/status/1849082544655859793?t=GbbJBPO19F9JsyZp5YlO6g&s=19