So ignoring the abstruseness and pretentiousness for a moment [x], what I don't like is this model of immutable networking Urbit has. Maybe I am in a minority position, but I fear the future where everything is cryptographically signed, verifiable and irrefutable. I want to be able to go on a website and post bullshit that I'll regret 15 years later. And if after 15 years someone unearths that post, I want to be able…
If you bound an identity cryptographically to your real name, that's permanent -- no getting around it. We all make mistakes. However, one of the benefits of Urbit is that you can build a reputation around a pseudonym that isn't linked to your real-life identity.
There's a place for the 4chans of the world, with totally disposable one-time identities. You can do this with Urbit as well -- use a 128-bit self-signing identity (comet). But most people tend to want a little more stability and permanence.