How useful is it really to have a scout report of a region that's a week old?
By that point, any troops in the region are likely to have moved on.
Depends on the context and for whom.
I more or less regularly look up old reports for insights. "How many troops does X have? Well, Y fought then 20 days ago, and they brought Z troops then..." Cross-checking old reports with various fresher info allows a lot of extrapolation.
Like, right now, I'd REALLY like to look at those battle reports for Unterstrom (12 days ago for the first one). There's a few things I want to check, but can't, because I didn't think of looking at them in time. So instead I have to ask some of the players there to copy-paste it into pastebin or an xls file to send it to me out of game (which I'm not really expecting any of them to do, tbh).
Also it's nice to save some battle reports for posterity, but usually the battles occur in intense moments, when you don't really have time/attention to bother archiving, and by the time you do, they are gone.
