Imagine a scenario where a critical server in a remote research station—isolated from the public internet for security—suddenly suffers a partition failure. Years of data are at risk, and the standard "cloud-based" setup tools are useless.
If you are an IT administrator managing 50 computers in a school or office, downloading 10GB of data across 50 separate machines is a waste of bandwidth. Download the offline installer once, put it on a network share or USB, and deploy it silently to every machine instantly.