Actually 2238 is between Fallout 1 and 2. According to timeline on wikia Vault Dweller left V13 on December 6 2161.
Than why Hub is still thriving? It was supposedly deteriorating into nothing right after the events from fo1 as they made nothing- just traded with other settlements.
Anyway- this is reloaded. I'm willing to let the wiki timeline pass into oblivion for all its worth to see some new features in terms of the world.
BoS could have settled there for a brief moment. Seeing there's a lot of potential in still pretty well preserved equipment, they could open a small base of operations there for the sole purpose of spying the NCR. In time they could even scruff up that place to build an advanced workbench there, that would be operational from time-to-time because of high energy usage. Creating windows of opportunity for small time player to finally get a grab of some better stuff without being raped by big gangs, or PK swarming other locations. (I still can't get over the fact that the most advanced faction, created around the idea to hoard all things powerfull and technologically advanced could just strike a deal with gun runners for access to their workbench..)
The potential of v13 as a new location is so great, that whatever would be there could be very usefull, or at least cool addition to what we have already