@Scott-Sumner I sometimes use it to verify that the lines end where they look like they end, and not off the page to the right. I suppose I could use the Show White Space and TAB option to do this, but unlike some others, I don’t think the White Space display characters are big enough. :)
The other reason I sometimes turn it on (besides your use of verifying mixed line endings) is when I have Word Wrap on, and even with the Show Wrap Symbol on, it helps me distinguish more easily where the end of the line is. I don’t keep it on all the time, but I guess the way it currently displays (as opposed to White-on-Orange, which would be hideous!) doesn’t bother me all that much, as I often forget to turn it off when I’m done. Ah, perhaps our grandchildren will be able to easily configure all aspects of their favourite editor.