For fun, while cruising in my car earlier today, I flipped on HD mode on the FM tuner for the first time in nearly a year.
Lo and behold - WMXD, WJLB, and WLLZ here in SE Michigan (iHM owned) completely removed all HD2 and HD3 streams. WKQI, which didn't have any HD2 or HD3 streams a year ago, still has none. The only iHM station to have HD-only 'side channels' was WNIC (which still carries "Sunny" on its HD2). WMXD and WLLZ each previously had HD2 & HD3 offerings, and I want to say WJLB had an HD offering previously.
WDRQ (Cumulus), which used to run its main station in HD1 and until a couple years ago had an HD2, still has HD completely turned off. Its sister station, WDVD, still has HD on and is still running 760 WJR on its HD2. However, the audio levels were so low it was virtually unlistenable!
Beasley has removed most of its in-house HD-only programming. 94.7 WCSX's HD2 & HD3 are now farmed out to third parties (Woodward Sports and Smile FM, respectively). 105.1 WMGC no longer offers an HD2 or HD3 stream.
Oh, when I listened to the primary HD channels, I was greeted with plenty of tinny sounding digital audio artifacts. In nearly every case, the audio sounded worse than the companion analog FM channel and reminded me of Sirius XM.
As soon as I pulled into my driveway, I turned HD mode back off. As an audio consumer, at least where I live, I fail to see its value.
I will see Audacy will still running WWJ on the HD-2 of WXYT-FM, Smooth Jazz on the HD-2 of WDZH, and programming for the LGBTQ community on the HD-3 of WDZH (audio sounded terrible). On WOMC HD-2 they were running Oldies and on its HD-3, they were airing local musicians. So, they are pretty much the only company - at least locally - putting any effort into developing unique HD content. Their reward for such efforts? Probably $0 or almost $0 for their top line. Why even bother? The resources devoted to those efforts could be more productively deployed elsewhere.