It would be great to be able to save reports as static reports. For example, at the end of the year, or at the end of every month, to be able to print a static picture of the donations at that date.
Right now, if we go back to last year's annual fund, some people might have changed their constituency codes so the report will look different today then at 6/30.
Yes, your right. Their constituency may have change. (Gift constituentcy does not.)
Because the report can change even in a day, if I know I need that report data as of a certain date (most often, end of fiscal year) I specifically export and a save the report.
I think based on the limited need and the programming needed, that saving a copy of the report would certainly be an easier option :)
I give the idea a vote though.
I export all my reports to Excel or Adobe to ensure I have "static" copies for future reference.