You know people like to argue whether or not "blitz spirit certainly existed" vs "blitz spirit certainly didn't exist".
Living this **second-hand**, but basing on the first-hand accounts, it seems like it both exists and doesn't exist.
In the moment it's scary. The air raid alarm is really-really scary no matter how much you get used to it. But it becomes a habit and the temporary limitations become a norm. What is left is rage and determination to destroy the occupants and retaliate.
What's left is the blitz spirit.