I read it. Sounds like hardware parts for rackmount servers are getting offered for sale to the general public. That's old hat, too - Dell has been offering those since before 2010, and even these days, they can be easily sourced from Amazon, brand-new. Expensive, yeah. Not everything is quite as compatible with each other as consumer-grade aftermarket PC components - yeah, there's that, too. But old hat, it's been there LONG before those blogger clowns.
It's actually quite boring. The machines they're building are pretty much run of the mill x86 based servers with medium amount of memory and average networking. They give them a handful U.2 disk slots, which is common in storage appliances (although they don't provide a solution for disk-based storage). Their mechanical mounting seems to be very close to normal 19" rackmount or OpenCompute form factor; the only unusual thing are blind mating power and network, so you don't need to manually plug in connectors when you add or remove a server. Their per-rack switches and power supplies, while bespoke and custom-built, have completely normal performance characteristics. In a nutshell, they're selling a standard 19" rack with standard half-width 2U rackmount servers and the shared power/network infrastructure. One could buy effectively the same thing by getting a standard 19" rack from a cabling supply house, a big order of SuperMicro servers, and a Cisco or Juniper switch.
A few screenshots down it says "Jan 6 2022", at which point only 12.2 and 13.0 existed, so I guess that could be the reason.
Unsurprising... ? For a small-time shop, the hardware components (that you kind of have to have if you want to offer your own cloud services, rather than rent) are prohibitively expensive. And, the stuff a small shop can afford - it just doesn't have the specs to scale appropriately. This is why small shops rent. This is why places like Github and Amazon EC3 exist in the first place - they have the hardware and capacity that they can rent out to the small guys.
You start by figuring out where you can contact them to rent. Then talk to whoever is doing the renting, and ask THEM about building an on-premise Amazon or Google datacenter. You'll end up with a quote to the tune of at least $10 million USD. ?
Oxide reimagines private cloud as... a 2,500-pound blade server? LLNL as a customer, not bad for "this moronic startup".
Now it's starting to make sense... so Oxide's selling point is this (as per that theregister.com article):
integrated backplane hardware component to commercial/private market. To showcase its potential, we built this rack server that is cheaper and faster than stuff that Lawrence Livemore currently has. This thing can run www/nextcloud and be viable commercially, or it can do compute tasks for Lawrence Livemore, and be competitive". 
That kind of marketing will reel in the money, though...