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All your network actions are processing 5-10x faster. A lot of the little things you do are instant at 1GB that added up at 100MB. Medium files are small, and small file transfers are barely noticeable. It changes the feeling of any UI that uses the network.

At 10GB, once you have hardware that supports it, the same thing is going to happen again. Your medium-sized files will feel instant.

On top of all that, you save time on large downloads, huge downloads become not inconvenient, and your whole household can pretty much do all that simultaneously.

Right now, 25gig would only be seriously considered for a business, though.