Serious questions: does anyone have an evidence based idea on how Satoshi generated entropy / keys? Is it known if he used a passphrase?

He didn’t use a hardware signer. It seems likely he used a computer that had been online or continued to be connected to the internet to generate randomness.

The offline only private key mantra feels like it’s potentially a psyop. It’s impossible for regular people to know exactly what components purpose-built hardware signers use. I’m scared of them.