You're not going to have a very good conversation with a 200-year latency. A normal conversation requires many messages on both sides. 1 year isn't that much

You're not going to have a very good conversation with a 200-year latency. A normal conversation requires many messages on both sides. 1 year isn't that much of a human lifespan, but if we tried to hold a conversation with a 1-year round-trip latency, it's not going to be a very good conversation; it's just too long between messages. But if you just want to blast them with a ton of information all at once (like sending them a bunch of video archives and a copy of Wikipedia, for instance), that's doable, but it's not a conversation.