To which I will respond, so what?All of the digital modes are narrowband...
The land mobile radio service had a need to reduce bandwidth. Frequencies were very hard to get in the VHF and UHF land mobile bands and it was very difficult to design a system requiring multiple frequencies because the frequencies were not available. By reducing bandwidth, more frequencies were made available. That's why the FCC mandated that LMR go narrowband and any future narrowbanding will virtually require digital voice modes.
We have no such FCC mandate in amateur radio. And, while repeater pairs can be hard to come by on certain bands in certain areas (I'm a frequency coordinator, so I'm deeply involved with this situation), there are also a lot of coordinated repeaters that sit un-used. IOW, we don't have a need or a mandate to use narrower bandwidths.
I appreciate that some hams want to experiment with digital voice modes. More power to them. Aside from that, I see no real attraction to DV in amateur radio. And, the downside is that the small segment of hams who used FM repeaters has now been divided across multiple DV modes. I don't think that dividing the pie into smaller pieces makes amateur radio any stronger.