A week ago I posted a poll asking;
> How much history is really useful in a messaging app?
Sadly I only got 13 responses, so the results need to be taken with a pretty hefty grain of salt. But ...
Among the responses, there was a healthy majority for 1 month. The longest option was 1 year, so the fact that this didn't win suggests that long term storage of messaging isn't a priority, at least for those who responded.
The poll is closed but still interested in people's thoughts on this topic.