I’m seeing anywhere from 50- 85% of people get goosebumps or chills listening to music. However, I’d say it’s probably extremely rare not to feel it and the ones that haven’t experienced it are listening to the wrong frequency. I wonder if each of us have a unique frequency, similar to a fingerprint. Each person having a frequency that is uniquely there’s but largely the same as others with only a micro difference from person to person.