I have now had confirmation from Samsung that the 2019 Q90R TV will never have eARC. I have been advised that if I can find where this was promised then I could pick this up with the retailer where I bought the TV from. For those with the 2019 Q900R, they will be contacted for an upgrade of their one connect box to be HDMI 2.1 enabled and eARC capable. So for 2019 Q90R - forget about eARC!
