Somehow, I feel it's a new dead standard. Even though there are more cases, it looks like most motherboards are low/mid or even budget series, and motherboard manufacturers act like they don't believe it will be a success. It feels more like an attempt to introduce something new to stimulate the market, but I can't see it being sold. I only see comments that it's nice. At the same time, sales of large gaming PCs are getting worse.
For me, it doesn't matter if you have 3-4 cables visible. Barely anyone uses all those additional cables that could be easily hidden with simple covers. Barely anyone uses storage other than M.2 on modern computers, so there are no cables either.
If 8/24-pin connectors were 90° in properly designed PC cases (with enough space around the motherboard), then the only problem would be graphics card power delivery that could be placed on the other side of the PCB or, like some brands already do, on the side. If they made it right, they would redesign the slot/socket placement and make something with huge graphics cards connected to already weak PCIe slots (graphics card holders are a joke in a properly designed product). ASUS introduced cards with a power delivery directly from the motherboard. Good luck with a motherboard upgrade/replacement. Not to mention, good luck buying it as premieres were a long time ago, but there are barely a few available models in stores. When you decide to build a PC like that right now, then think that soon will be the premiere of the next generation. Later this year, new AMD and Intel CPUs and new chipsets will be released. It means new motherboards and an upcoming new PSU standard.