Before we begin throwing shade at LG over this, lets consider that most issues that were discovered were somewhat niche and only discoverable by people putting the TV through its paces. That's not me making excuses for LG, but it is literally impossible for them to correct every bug before pushing the product to market.Yet they worked with Nvidia on these things for G-Sync support so I am sure procuring a pre-production 3080 would not have been much of a problem. They must have had some way to test HDMI 2.1 anyway even if it is backwards compatible. Remember that the 2019 C9 series was already fully HDMI 2.1 but suffered from some of the same issues the CX had so it took them quite a long time to fix them. Glad they did, but they do deserve some flack for not testing well enough in the first place as many of the issues are easy to replicate and were discovered early after release by end users.
I blamed some of the issues on my Club3D adapter but turns out things like wrong color spaces for HDR and some of the handshake issues were totally problems with the TV.