Also, his idea about hanging buildings from the wires is bunk. If you hang your buildings from the tensile structure that is buoyed by air and you have a rupture, now your buildings are going to collapse. Likely onto other buildings. Since his design has no compressive strength at all there is no way to address that issue.
[edit] what makes it more bunk is that in order to have tall structures, the entire habitat has to be the same height as the structure, instead of placing them near apex of a hemispherical structure. So he's just doubled the volume versus a sphere. Also if you make a bubble structure that tall you have to handle the pressure on the walls. I don't see where he mentions walls at all except when talking about how dome walls suck. Not as much as trying to pressurize a rectangular pressure vessel! The only place his solution shines is in 'doming' a valley or a canyon, where a dome has a host of other problems he hasn't even covered.
I can't remember if the bubbles on the Eden domes contribute strength to the structure, but I expect you could design them to do so. Then the structure begins to more resemble a bouncy castle (like the ISS inflatable hab unit).
Space habitats so far look more like submarines. It’s a bunch of tubes with bulkheads. But they don’t scale, and some of the biggest ones so far are in fact inflatables.
If you nested inflatable structures, the forces on them are due to the pressures between the layers. You could run an outer chamber that requires a respirator, an inner one for living space, and a third for medical. An alarm system in each layer could begin capturing atmosphere in the event of a breach, with emergency venting for over pressure. You would only risk half of your air to a single failure.
The Eden project uses hexagons panels that resemble a blister on bubble wrap. No accuse angles there. And why can’t you cable a dome down the same as this design?
The idea of a dome is volume. If you aren’t going to build upward in the dome, why bother? Building upward avoids interfacing with the envelope.
If you could work out how to construct a dome over the top of an existing dome, you wouldn’t even have to move. Just deconstruct the inner dome and begin expanding outward.