[Geee]

It's not very private if your Ethereum account is connected to it. Ethereum accounts should be considered PII. After all, KYC requirements on exchanges makes your accounts easy to link to your identity.

Logging in with Bitcoin (LNURL-auth) is much better implementation. It's just standard public key cryptography, which reuses your wallet seed to generate keys for logging in. Nothing about your addresses is shared or recorded anywhere.

[ETH_start]

With MetaMask it's trivial to create a new Ethereum account dedicated for this particular purpose, and not linked to any on-chain transactions.

[DANmode]

CLI options, hardware wallets, lots of paths.

[kinakomochidayo]

LN UI is crap unless you use custodial services. People can just use zk privacy to anonymize, and run their own nodes to connect their web3 wallets to.