If we look at the history of quantum computers, it started around 1980's, so definitely, Satoshi have known and think about quantum computers because it is already existing and developing even before Bitcoin was created.
And he did not move his early mined P2PK Bitcoins to quantum resistant P2PKH addresses.
I guess when quantum computing becomes a threat to bitcoin that all miners will move to it too..
They will move to quantum computing to get Satoshi's early mined coins. Satoshi knew it and knows it. He could stop it through transfering these coins to P2PKH addresses today, but didn't and doesn't. He supports the better technology.
Do you remember what happened when people developed ASICs? They moved from PC mining to ASIC mining as it was better.
Bitcoin is a pure competition platform where the better devices win and Satoshi rewards the first quantum computer owners with his early mined coins.