It just occurred to me, it's been very quiet in my apartment lately.
Either my noisy but deaf neighbour upstairs has moved or I'm getting
too acclimatized to the sounds.

I'll have to pay more attention tomorrow. No matter how many times I
hear his fold out sofa bed springing shut ever morning,"boing!!!", I
don't think I'll ever get used to that to the point I don't hear it.
The sound is too jarring and abrupt and the little thumping/springy
sound it makes as it hits the top of my ceiling is unmissable.

Maybe "upstairs neighbor in 4d" has finally moved out? Please...that
would fantastic!!