Do dual AIBs help?

If you read my article on multi-GPUs you know that SLI and Crossfire have been retired, and Nvidia has introduced NVLink. The intrepid Mark Poppin of BabelTech Reviews wanted to find out if adding a second AIB could actually improve performance. He hooked up an Nvidia RTX 3090 FE and an RTX 2080 Ti (adding up to ~ $2,800 of AIBs) with NVlink to find out. Then, because he is insane, he ran about a zillion benchmarks, which is what he does in lieu of sleeping. You can find his report here. A summary of his conclusion is: forget RTX