It actually can be explained simply:
Cross platform deployed VMs with their own primitives that also have the ability to network with each other via a custom protocol.
That's interesting and potentially very valuable.
Keep in mind this whole Hacker News and Ycombinator paradigm is effectively an outworking of the same process. Some savant Lisper with their own dialect making in a unique way that over time was re-coded and made more accessible.
It works for Apple.
Jobs insisted on elegance and simplicity throughout, creating products that were instantly loved and admired, products that people would be proud to own and display. Technobabble was worthless to him and he did everything possible to keep it away from his customers. He expected his engineers to deliver something decent and real and trusted them to figure out the details, focusing exclusively on the vision of shipping usable, beautiful products that provided immediate value to every user, regardless of technical background.
Steve Jobs's devotion to elegance resulted in products so appealing and downright seductive that they fundamentally changed the public's expectations from computers and consumer electronics generally -- not just once (Mac), not just twice (iPod), but at least three times (iPhone; honorable mention: NeXT/OS X).
We lost him too soon.
Meanwhile, in Yarvin via Urbit, we are offered a ground-floor rate of only $512 per placard in The One True E-fief. Urbit is here to show us that they know best. That we'd be better off if we'd just raise our eyes out of the mud long enough to recognize our obvious inferiority, take our oaths of fealty, pay our taxes, and some day, when They've decided the time is Right, They'll bestow upon us The One True Network.
There could not be a starker contrast.
He was man that even his daughter despise for being inhuman with his own flesh and blood, for denying she was her child for years.
Having interacted with Apple users since 1984, the only common trait they have is exactly believing there is only one true way, not that their way is better thanks to the sum of well though technical factors, but because it's a faith, that, as any other faith, is impenetrable to critics and doubts.
The fact that the failure of Next is still told as a great success speaks volumes.
Another famous example is the Apple III, costed a fortune to build, sold poorly and the people who worked at it remember that
"The Apple III was designed by a committee headed by Steve Jobs, who would demand one thing one day then the opposite the next."
Jobs built a cult, not a technical revolution.
NeXT resulted in the web browser and the iPhone.
Adapt and embrace has worked _very_ well for Apple.
This is not only arrogant, but stupid approach to building things if you want to get adoption. To build things for the people, you should try your best to integrate into the existing world, not to replace the world itself.
Urbit is literally the opposite of Apple.
This project has gone so deep into its own inner sanctum that they've lost tabs on wider reality. While the result may have glimmers of technical excellence for brave souls to excavate some day, the impact of the juxtaposition between latent expertise and overwhelming derangement is enough to scare away (literally scare away) basically everyone.
This style of issuing a large corpus of dicta that comprise "the One True Way" never works, not even in actual bona fide religion. Systems and protocols that last are built iteratively by collaborators across institutions, each piece finding immediate utility as it's integrated and deployed.
The big question around Urbit is not whether it will succeed -- rather, it's whether Yarvin will appreciate that he's rapidly disproved the nascent brand of proto-monarchist philosophy Urbit was meant to realize. [0]
See also: Pontormo at San Lorenzo [1], Xanadu [2]
[0] https://en.wikipedia.org/wiki/Dark_Enlightenment
[1] https://blog.garrytan.com/always-be-shipping-a-lesson-from-j...
[2] https://en.wikipedia.org/wiki/Project_Xanadu