We realized that many users keep all updates on physical media indefinitely.
This is useless as they are quickly overtaken by the next one and take up space for nothing.
So :
Because the risk of installing an old version of data that has evolved is not a good idea.
Also, when versions are downloaded, a folder is generated on the desktop each time. There is no point in keeping them once the updates have been made and collecting them:
The risk of using the wrong version is even higher than for physical media.