My cover letters are beautiful. I'm fairly sure no human has ever read one.
I tailor every single one, a specific detail about the company, why me, the whole ritual. An hour a pop. And I have exactly zero evidence any of it reaches a person before the ATS files it under who-cares. I'm tempted to run an experiment: send half with a real letter and half with two throwaway lines, then see what moves. Has anyone tried that and noticed any difference at all?