It should be possible, sure, just like it should be possible to forgo utf-8 and save your file with the iso-8859-1 encoding. But it's the less useful case. Many (most) programs do not care whether there is a final newline or not, but among those that do care, missing endlines will run you into more problems than the opposite (e.g.: Git, GCC, wc and cron will either complain or not work as expected).