This always bothered me really.....
Building an stargate is an epic venture, plenty of manpower and resources poured into it, but also strategically.
You want stargates to new undiscovered locations (with potential valuables to exploit) or short-cuts to shorten travel time or to flank your enemies.....but them being "common and economical" does not make any sense really....new "transportation" technology usually makes obsolete older one unless the older stays economically viable or has less requirements to be useful (ie trains vs highways, in one you need the track, the station and the train, on the other you just need to lay down the concrete and its the users who bring the rest). So if you can create gates anywhere by having some permits, then the ammount of traffic and alternatives routes is absolutely huge compared to what we see in-game.
In particular, when jumpbridges were added to the game, i thought of them as temporary "unstable" gate avenues, the technology was perfected enough to be able to secure a stable channel for a given ship, but not keep the channel open all the time. Only the crazy capsuleers would be willing to deploy and use such technology, as the nations could not ensure 100% efficiency with such devices.
But still, missions like "the blockade" or some of the FW missions indicate there are thousands of other gates available out there which are not public.....well i cannot quite come to terms with that.....cause such gates ARE of national interest to any government....regardless if operated/regulated by CONCORD or any other nation...you can't control the entire space inside a star system, but its in your best interest as any governing body to place as much control as you can at the entry points to ensure it stays relatively "clear" of undesirables.
It's something i think needs some revision by CCP and also there is another thing.
If you are a nation looking to expand, to colonize and explore worlds, harvest any and all resources in your reach, one would open gates to every star system within your borders, but it seems each civilization only opted to go to "stable" star systems, or less harmful ones. Why not open gates to magnetars? neutron stars? protoplanetary disks? nebulas? or any other thing that could open "holes" to travel to? thats another thing that bugs me.....these details about the universe have been known for 30-40 years at least, CCP could have designed a much more varied enviroment to travel around than what we have today.