You are right of course. I am also unable to stream from Tidal/Spotify then. Which makes it pointless for me.
As
@TKpurple said, in most of cases when MojoPoly is used as a portable system, power/charging is not an issue, since...
1 in th office for headphones - I got 2 chargers and can juice up both MojoPoly and my phone,
2 in the car for music playback via oux in,- I can't do it, since my car does not have aux in, so I'm forced to use BT there - which I find tolerable, especially durng longer trips, which a louder due to higher average speed (not to mention the noise from roof box).
3 in home attached to power amp and speakers,- I use my iRDAC there, as I feed my system from many different sources and I find plugging Mojo/Poly in and out of the system annoying - but I might give it a try when I have too much free time
4 in home with headphones in bad time. - Do the same, in good time as well - power consumption in my home wifi range is ok,
5 in friends homes using Minirig portable powered speakers - this I do not.
But except for home headphone use, this is all still a portable application. Mojo/Poly as a mobile solution it is far from perfect now