Keep in mind, these NOS/Tube DACs are somewhat the flavor of the day in a subset of the audio community. Some love them, some don't. If you are going for that "vinyl" sound, then perhaps they are the right choice for you. If you are not, then keep your choices open.
Some things to keep in mind,
Supposedly, Tidal Connect now supports 24/96 on Chromecast and includes the first 2 unfold steps. That does not get you the full MQA support that the Bluesound Node2i does, but gets you a lot of the way there.
If you use the Node2i as opposed to the CCA to drive the MusicHall, digitally, it looks like the signal may be similar (24/96 - 2 levels unfolded). Since you are going optical, there is no electrical interference transferred from either the Chromecast or the Node2i. The Chromecast is obviously not a high end device, but it is not like the jitter is going to be wickedly bad (optical already is). If you can use the coax output on the Node2i, that will probably be better, but it can introduce electrical noise. You probably also want to disable the Audio Clock Trim and make sure you have MQA external DAC turned off in the Node2i since your external DAC is not MQA enabled.
TIDAL is pretty much it for MQA. Qoboz no. Amazon Music no. Will Apple, Spotify or Google use it if they go to an HD tier? Seems unlikely. I expect there are licensing fees to balance against data costs that are always declining.