I know plenty of relatively small businesses in my area that use business-class asymmetric DSL connections with an upload speed that tops out under 40KiB/s. Many of these businesses are not in an area laid with fiber-optic cable. I have no idea how much it would cost to get dedicated fiber to a business in an area where it hasn't been pre-laid, but I imagine a nontrivial sum.

Small businesses still generate data that needs to be archived. Uploading a TiB of data at ~40KiB/s would take the best part of a year.