Anything that prompts Discord to provide more options regarding message retention would be a step forward. Instant messages were never designed to be a permanent storage medium for information archival. I don't think anybody should need to worry whether a data breach will unearth something they said in a private chat fifteen years ago, just because their service provider didn't offer a practical way to automatically delete old messages.

Looking at the votes though, I suppose HN does get use out of Discord's unlimited message history. Personally I'd rather have more control over my data than that.