Digital audio out hasn't been on any new Mac since 2015 if I recall. Given every newer model can output all the SPDIF compatible formats, plus all the high-res formats (DTS MA, Atmos, etc) in current use, either via HDMI, TB3 or a USB dongle, it's hardly that much of a problem for anyone who wants it. In my case, I'd be buying a TB3 dock anyway…