Regret is too close to the connections that trigger nostalgia.
"Remember this? Remember when you were a child? Remember the limitless possibility you felt? Do you remember the safety? It's not here now. Forever gone. So much change, is anything the same?"
And it spirals from there.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko