I believe that you should account for future growth when planning infrastructure - i.e., 100Mbps might be sufficient for even the most demanding users and overk

I believe that you should account for future growth when planning infrastructure - i.e., 100Mbps might be sufficient for even the most demanding users and overkill for most but 5 or 10 years down the line it might be viewed as barely adequate – the same as we're discussing 2Mbps right now.