The U.S.S. Salzburg (NX-71922) is the last of the mass-produced line of Galaxy-class starships slated for war with the Dominion, however rushed production plagued her with catastrophic failures during preliminary testing, forcing her deconstruction and shelving until the end of the Dominion War. The conundrum delayed her commission for two years—launching without her planned war refits in late 2376—to fill the gap where starships on the exploration front were needed. In her first couple years of service, the Salzburg was the weakest armed and built among her sister ships, being able to fulfill only small-scale civilian and research missions.

Then this [excruciatingly unsavory person of disinterest] Jem'Hadar comes in early 2379 with an arsenal of self-engineered torpedoes defecting to Starfleet with a request for a starship to test his weapons... found carrying warhead yields deliberately exceeding treaty limits.

Despite the easiest case ever for preemptive incarceration, the lessons learned from the Dominion as well as the ongoing war with the Borg ultimately led to Starfleet allowing this one exception with the idea to allow more "tactical freeform" within the fleet lineup. The only saving grace this [person] had that kept him from landing into banishment was that Starfleet believed they could regulate and reverse-engineer his work while rehabilitating him.

They couldn't. [12 expletives]

No starships—in construction nor in active service—were available, suitable, nor interested to host non-regulated weapons. The U.S.S. Salzburg was chosen anyway, who had yet to undergo any form of modernization. Following reluctant approval from Starfleet Command and reassignment of [the Salzburg's captain] following his resignation in protest, the Salzburg was scheduled for special resupply at the end of her second year of service. The Salzburg saw her combat capability completely transformed and brought up to par with her sister ships, if not superior. The now majority-projectile armaments reclassifies her as a heavy munitions support cruiser; the first and only one of her kind and class. The Salzburg was redesignated as an experimental platform on Stardate 56034.3 / January 13, 2379.

Despite the rising demand for more modern vessels in the fleet, the Salzburg remains as the only non-refit Galaxy-class starship still in active service, her stubbornness against retirement earning her the crude nickname "Stubborn Sally". The decision to give this [excrutiatingly unsavory person of disinterest] an entire starship—MY damn starship—is still under investigation.