Absolutely. There are certain niches where you really do need to focus on portability.
But like you said, a bike like this is extremely expensive, that's because a ton of budget is going into trying to counteract the main downsides of a folding bicycle: They're clunky, they're inconvenient, and they're heavy.
But for anyone who is able to sacrifice the floor/wall space, a standard bicycle will be lighter, and specc'd with higher quality components at the same price point.
I mean, of course they do! Austerity starves working class folk, and leaves them desperate.
Desperate people, largely, don't have the energy, time, the means to fight for better labour conditions, better wages, better insurance, better benefits, or really anything. Starving people don't have the means to fight.
If we're asking what people mean when they use those descriptors, then you're correct.
However, literally speaking, in this context, immutable only means read-only, and atomic only means that updates are applied all-at-once or not at all (no weird in-between state if your update crashes halfway through).
The rest of the features (rollbacks, containerization, and immutable meaning full system image updates) are typically implied, but not explicitly part of the definition.
I'd try the egg pizza. Olives with the pits is a choking hazard, because people won't necessarily be expecting it.