Trouble is that some of us may not immediately notice that WD has been flat-line graphing and logging (for up to 5 hours in my case) and if WD carries on graphing and logging then the history data on the logger is not easily recovered. Which is why I asked Brian to make this mod for WMR200: see my (later) posts in this thread Weather Display goes flat line. Works fine (with one new problem that may not have anything to do with the mod!).
I also suggested it might be made an option, so that individual users could choose.