I have come across a codebase where there was an "Import data from HTTP" functionality that extended the "Import data from file" functionality in such a way that the HTTP calls were grafted onto and around the file operations. This probably made the HTTP class quicker to write, but

- Anyone wanting to make changes to the HTTP import functionality needed to also fully understand the file import functionality since basically all of it was used to import from HTTP, and

- Many changes to the file import functionality also broke usages of the HTTP import functionality. (Fortunately these breakages were always revealed by automated tests before they made it into master.)