While not the original motivation for me personally it's a UX advantage: If a file I'm editing has a new line at the end I can skip to the end of file and then

While not the original motivation for me personally it's a UX advantage: If a file I'm editing has a new line at the end I can skip to the end of file and then move upwards again line by line with the cursor ending up at a defined position (i.e. the first column in that line) each time. If, however, there's no new line when following the same routine the cursor will end up at a position defined by the arbitrary length of the last line in that file, which for me at least is not what I want as a user in most cases. Then again, maybe that's just weird muscle memory acquired through long-term exposure to how text editors usually work.