It's not just about setup and configuration, it's about seeing the volume or stream and config info without needing to look at a phone/tablet/computer during a movie.
Storm Audio is adding back an OSD with their new card and Trinnov is supposedly going to use the same chip and vendor.
Couple that with the recent 8k + OSD products, it's very clear it's not going anywhere. If you don't need or like it, just turn it off.
NAD, Acurus, Lyngdorf, Monoprice/ATI/Datasat will pretty much be the only ones left that don't offer an OSD.
If you want the OSD to be overlaid on top of ongoing video instead of as a separate blanked out screen, we are now talking about video graphics processing in the pre/pro (typically in the scaler chip if they have scaling capabilities which is also a legacy issue - they don't do any better than the scaling within the display monitor itself) to mix with the ongoing 4k or 8k video which adds to heat and cost not to mention complicate the noise handling within the chassis for audio chain. And then people complain about not having the SINAD of a dongle.
Not saying OSD has no use cases, but the amount of work needed inside the pre/pro to provide that functionality is way out of proportion of having it implemented (and duplicating all the configuration that can be done via phone/tablet).
The tablet/phone is not the right interface for status, that I agree with.
Part of the original motivation for the OSD display (in addition to the configuration) was the small displays on the device itself. Even so, I have never needed or used OSD do make volume changes or to figure out the current volume or to mute it. The device display is good enough for that. Anything else is an "off-line" activity easily done with a phone/tablet or the device interface itself.
The units now with bigger built-in screens should make the OSD even more moot. When I am listening to music, I don't have the TV on. OSD wouldn't help there at all for the same use cases. So you need a device interface alternative anyway.
People used to OSDs from legacy aren't going to like not having it but there will be a generational transition, that I am sure of.