1. Culture places less importance on musical activities, thus less demand for HEA
2. Listening has migrated to streaming and quality is sometimes unavailable, sometimes not of interest
3. Listening styles have moved away from demanding content (such as classical and jazz) to pop and hip hop that requires less HEA
4. Americans have less disposable income (paid your health bill recently?)
5. Younger generations are visually oriented and prefer video games over straight listening sessions
6. And get ready for the "no everything is great and HEA is thriving like never before" responses -- worthwhile checking to see if these are made by industry people...