So in Boston (which is the No. 10 radio market),

https://ratings.radio-online.com/content/arb013

WBZ 1030 AM (news radio) hovers around no. 5. They transmit on HD radio also (HD 2 on 107.9 FM), but the range is limited compared with AM.

RKO 680 AM (local right wing talk radio) is also near the top.

Conclusion: AM is not dead