"when 2Mb broadband was first released, we had no notion we'd ever need more"
I had this argument with my mother exactly once, when she switched from dialup to broadband and she was looking for the cheapest package while I recommended taking the faster package for a few more £/month: "What would I need it for?" "You'll find something to need it for." Next time she wanted to upgrade her internet connection, she opened with "What's the fastest I can get? I don't know what I'll need it for, but I'll find something".