hdmi 2.1

It is my understanding that HDMI 2.1 supports up to 48Gbps of bandwidth allowing for uncompressed 8k and higher quality audio. But isn't that pointless if your HDMI 2.1 source component is plugged into your receiver/processor that only has HDMI 2.0 inputs that can only handle 18Gbps of...

Hey guys, just wondering if any of the 8k AVRs stand out from the rest? AFAIK, there is the Denon 6700H and 8500HA, and the Marantz SR8015... Are there any others? If not, are there really any major differences between these AVRs? They are all Audyssey XT32, power handling they are the same...