[Q_is_4_Quantum]

This was interesting thanks - makes me wish I had the time to study your examples. But of course I don't, without just turning to an LLM....

If for any of these topics you do manage to get a summary you'd agree with from a (future or better-prompted?) LLM I'd like to read it. Particularly the first and third, the second is somewhat familiar and the fourth was a bit vague.