The defined elements of Wormhole travel are the mechanics and cost. There is no theoretical limit to the range of them, they require large facilities which are power-hungry even by the standards of Stringtech 8+ Civilisations, and one end of the gate must be anchored to the generator facility. The generators are expensive to use, and extremely expensive even for the ultra-tech post-industrial societies of the SA setting to construct.
There are also "Wormhole Interdiction" areas, where such travel is prohibited- the implication is that fields prevent Wormholes being opened. My own feeling would be that there would be gaps in these, official transfer points, and the possibility of taking the interdiction field down in an emergency with the right authorisation.
Wormhole travel is, it would seem, accessible from the Infosphere via a Neural Mesh, but require a substantial cash expenditure (based on the Roamer story). So, in theory any citizen with a Neural Mesh can access the Infosphere and have a generator on that planet open a gate for them. In practice, I suspect that there will be restrictions on who can have a gate opened, and anyone else has to contact the appropriate authority to pay the fee and get access.
Given that the Roamers had to save up money for the Wormhole transit, but didn't take too long to do so, I would compare the cost and availability of Wormhole travel in SA as being similar to Air Travel in today's world. Anyone can do it, but in the average person will have to spend a significant amount of their disposable income for the next couple of months to have a gate opened. The process of opening a gate will be like booking a place on a flight- a time and place for the gate will be arranged, subject to the availability of a gap in the generator's schedule.
For the average person, Wormhole travel will always be a possibility but one that is used very infrequently, unless they have a job which requires regular travel to distant places. The richest members of society, however- the equivalent of people with private jets in real life- will be able to afford using them as a casual mode of transport, having houses and circles of friends spread across the known galaxy and moving from planet to planet as frequently as most people move from one building to another over the course of a typical day.
Then there is the official use of Wormholes, by the Police and other emergency services. I imagine that someone who works for these will have "Emergency Access", allowing them to use a Wormhole without paying them cost themselves as long as it's for official business. In an emergency situation, they can presumably petition their superiors to open the interdiction fields- for example, if there is someone critically injured and in need of medical aid and a Wormhole is the only way to get help there in time. PCs working for the Patent Office will presumably fall into this category on many worlds.
With high Cognitech scores, the process of arranging for a Wormhole to be opened will probably be a fairly swift one. For an average citizen paying for transport to another world it would probably take an hour at most, for emergency services or "privileged" customers, the process would probably be near-instantaneous unless the area is Interdicted- then, it probably takes several minutes, or as long as the GM wants it to if the PCs are the ones requesting the gate.
These are my takes on the given details, what do others think?