Alexa will power the 4700 on and off, so it is not a complete failure. Other than that, HEOS works well, and supports Amazon Music Ultra HD Hi Res Audio playback at the correct sampling rate. It also handles DSD 2.8 and 5.6 MHz streaming from the PC using a DLNA music server. Sadly, it does not handle DSD 11.2 MHz.
https://www.amazon.com/Denon-AVR-X4500H-Amplifier-Streaming-Calibration/dp/B07GH5GS5T