Man of Honour
AMD Navi 32-based Radeon RX 7800/7700 series reportedly targeting September launch
AMD Navi 32-based Radeon RX 7800/7700 series reportedly targeting September launch - VideoCardz.com
AMD might already showcase Radeon RX 7800/7700 at Gamescom AMD is reportedly targeting a September release for its Navi 32 desktop GPUs. According to the latest video by Moore’s Law is Dead, the GPU manufacturer has completed the development of its Navi 32 GPU and has already released...videocardz.com
That Hybrid sounds interesting.
The same rumour source that the page you link to uses also stated that the 70CU Navi 32/31 hybrid you refer to will not be launched at the same time, won't be launched any time soon and might never be launched at all. It seems that AMD wants so much for it that no card manufacturer wants anything to do with it. Apparently it's been wholly ready for retail for at several months, hardware and software all done. Allegedly some potential AIBs have had fully functional, fully supported, completely retail-ready cards from AMD for a couple of months now. Not interested.
I think it would sound interesting if it was available to buy and if it was priced reasonably for its performance. Which I am sure will not happen. If it's launched at all, I think it will be a mostly paper launch with no publicity and a handful of cards at a price that will make them interesting only to collectors of rare graphics cards.