Hopefully you can return to these type of conversations but from a different viewpoint, one that's more broad yet also specific. Talking to strangers and having open-ended conversations was a favourite past time of mine. Sometimes, it's easier to talk when there's no need to lay out a context for the other person to understand what you're saying. I think from a broad sense, people are becoming less social, the world has changed quite a bit from a couple of years ago.