Comment 2 for bug 902548

Though this is not a bug,i like this idea as it could save some diskspace. I once had 700 mb of database cache as I never knew that with every update i.e "sudo apt update",the database would get updated and sync and just dump the new one.Never ever the old and not needed would still exist as memory hog. Though now days I clean the cache aka "sudo apt clean" every week.

The process could be like apt first gets the new update,then as soon as it reaches 99% it compress the copy in a file named apt_[date:time].zip. Then it would perform any additional task if required. When every thing is over it would remove the uncompressed files(flat file).