While ARC handled more bandwidth than optical, it can and usually is a hassle. With eARC handling more bandwith than ever, I'm sure more folks would like to see the bugs in HDMI-CEC worked out as more Smart TV apps support Dolby Atmos. I purchased a new TV, receiver, UHD blu-ray player and an Apple 4K two years ago. I also updated the software on a few years old TiVo to enable HDMI-CEC. After nearly two years and many different firmware updates on all of the devices, it all finally works most of the time and I can control all of the devices with the TV's remote control and the TV actually switches to the selected device. I still have the optical cable hooked up in the event it all goes south. Many find it difficult to use ARC simply because every manufacturer has their own name for HDMI-CEC and they don't know that it needs to be enabled for ARC to work.