There's a pretty long list actually. If you've got 10 people in a office sharing a 10mbit pipe then the internet is straight up prohibitively slow. On top of that, if your users are on slow internet then they are less likely to interact with whatever you are building, especially if it involves rich media interaction like uploading photos/videos (and upload speeds are even slower here). Then there are workflow collaboration tools like teleconferencing, dispatching of large files over networks that can take hours. It makes it harder to work remotely and adds a fairly large extra cost for small tech businesses to absorb in getting decent internet set up. And this is all going to get worse as the rest of the world speeds past us and starts creating content for gigabit internet while we are sitting here trying to get by on our promised 25megabits.