You never know how, when, or why you may encounter people you thought you left behind decades ago. A psychology experiment decades ago found that there are about six degrees of seperation. Someone decided to be funny and test that finding using Kevin Bacon as an example. Nowadays, with the everday integration of social media, those degrees of seperation are smaller in size.
Regardless of such findings, you should always assume there’s the possibility of bumping into a long lost acquaintance at a random event. Everything goes full circle.
As such, I always remind people start well and end well. Cone in right and leave right. Bring sunshine and don’t burn bridges. Simple!