Having multiple users certainly increases the need. However, my experience is that speed increases bring diminishing returns. Going from dial-up to 2Mbps ADSL

Having multiple users certainly increases the need. However, my experience is that speed increases bring diminishing returns. Going from dial-up to 2Mbps ADSL was a huge jump, and ADSL2 also made a big difference. However, for a single user, there's not really that much difference between 20Mbps, 40Mpbs and 80Mbps. You have a faster connection to the exchange, but you're still limited by the speed of the net and the speed of the servers you connect to.