I haven't had much interviewing experience lately, since I was at my last job for 5 years and at my current job for 6, but over the past 15 years or so, I came

I haven't had much interviewing experience lately, since I was at my last job for 5 years and at my current job for 6, but over the past 15 years or so, I came to the conclusion that not hearing back was the norm rather than the exception. I think it's ludicrously unprofessional, but that's typical these days.