I'm thinking how it would work. What should I talk about - programming frameworks and techniques I don't care about anymore? Rock bands I don't listen to? Shared friends I don't know now? Current school/uni things? Magic the gathering cards? Anime? Rock climbing? I don't know about anything I have in common with my old friends. But maybe, just maybe, it we catch up we can talk about kids or best back pain medicine. Or rock climbing, because that's one of the few things I still do.