Tangara also has basic Bluetooth SBC audio support, with more modern codecs possible via future firmware updates.
Well SBC is basically useless so I hope the development is not too far away in the future.
I see it's Bluetooth v4.2 but as far as I know the best codec available compresses down to 1 Mbps but v4.2 supports up to 3Mbps and v5 up to 6 Mbps so still room for improvements but that's up to headphone manufacturers to support these future codec.
Why would you want to not have Bluetooth Audio when it is extremely cheap to add and basically comes bundled with most WiFi chips nowadays? It just allows the user to use the device in more situations eg. Coming home from a commute and then continue with your music on your home Bluetooth kitchen speaker or change to your car speakers. I don't know, but I don't really see the appeal for the device yet, however I do appreciate the general philosophy of the design and open sourcing everything. I'd want a truely offline music podcast device that had both 3.5mm Audio and exelent Bluetooth and WiFi capabilities because using the phone can be annoying sometines.
I guess I'm wanting Tangara to cater to the HIFI crowd, and add more HIFI capabilities, file support, something to compete with devices like these: https://slrpnk.net/post/17871660/13529567
Which isn't mutually exclusive with having WIFI and Bluetooth connectivity.