I recently returned to a hole in the wall restaurant that I used to frequent in my college days. One of the few actual restaurants in the city that never closed.
A decade later, a semi nonsensical scrawl about being kind and good to people I'd written on a dry erase board while quite drunk... was still there.
It only needed minor updating to be more gender inclusive, which someone else had done without removing any of my writing.
When I was frequenting this restaurant, the whole board was wiped every week or so.
For some reason, what I wrote persisted for a decade.
I couldn't believe it.