There is no significant latency on usb-c DAC's. In fact most internal DAC's are just the same chip connected to an internal USB bus.
Bluetooth absolutely has a noticeable delay depending on the codec/profile.
Bluetooth absolutely has a noticeable delay depending on the codec/profile.
Currently we're using Beyerdynamic DT770 Pro and some MDR-7506.
They'd also need to be fully passive, as any active processing introduces unpredictable delays of up to 16ms, which is unacceptable when the goal is to check sync on audio and video signals.
It sounds to me like you only see everything as consumer devices for media consumption, ignoring the needs of people using computing devices to create things professionally.