I think given the box has a Chromecast built in, the necessity to have an App to drive any current or new streaming service is not there. Having said that, the convenience of using the remote to scroll through and select options from those services which do have a built in app is better; as a consequence I've definitely used my NowTV account less since I had the Aura, even though I could quite merrily cast it either using the built in Chromecast or my dongle that I've still got in place in the HDMI3.
Having said that, there really should be no good reason why one flavour of Android TV has services A B and C available whereas another flavour has only B C and D available etc. One of the pro's for me of Android TV is that it should take the onus off the box-maker to partner with the relevant services to get the features available on the TV. Maybe it will just be a matter of time. I know still some Android phones can't operate certain apps, but that has diminished hugely over time, and now if you bought an Android phone on version 10 or 11 you'd be rightly surprised if you found that that one didn't support Netflix or NowTv etc.
