Not quite gone away yet. There are 13 experimental channel 6 stations using ATSC 3.0 to continue sending an analog FM carrier on 87.75 MHz. ATSC 3.0 has reduced bandwidth options of 5.752, 5.671, 5.590 and 5.509 MHz. The 5.509 MHz option is used and the OFDM signal is shifted down approximately 200 kHz, leaving enough room for the FM carrier and modulation at 87.75 MHz.
The stations are WNYZ-LD New York City, KZNO-LD Los Angeles, WRME-LD Chicago, KBFW-LD Dallas/Fort Worth, KBKF-LD San Jose, WTBS-LD Atlanta, WDCN-LD Washington DC, KEFM-LD Sacramento, WEYS-LD Miami, KXDP-LD Denver, KGHD-LD Las Vegas, KMCF-LD Fresno, and WPGF-LD Memphis.
The FCC has issued an NPRM to decide if these stations will continue.
The stations are WNYZ-LD New York City, KZNO-LD Los Angeles, WRME-LD Chicago, KBFW-LD Dallas/Fort Worth, KBKF-LD San Jose, WTBS-LD Atlanta, WDCN-LD Washington DC, KEFM-LD Sacramento, WEYS-LD Miami, KXDP-LD Denver, KGHD-LD Las Vegas, KMCF-LD Fresno, and WPGF-LD Memphis.
The FCC has issued an NPRM to decide if these stations will continue.
https://docs.fcc.gov/public/attachments/FCC-22-40A1.pdf