Well, many times throughout history manufacturing traditions were changed.
At one time, Klingons operated only deep space vessels. This changed with the expansion of the Federation, causing the Klingon Empire to move toward a fleet comprised of smaller short range ships in majority, relying on overwhelming numbers. The next change came with the destruction of the Klingon moon Praxis, severely reducing the strength and size of the fleet, as well as the design of more efficient designs.
Now the Klingons, after a civil war, and three separate wars with others, have decided that the new priority should be a massive fleet as before, with a balanced ratio of capital long range vessels and short range defensive craft.
Humans would take thier time, triple or quadrupal redundancy and long life the halmarks of Federation designs. Almost all mainfleet vessels of the line were deep space exporitory ships. This changed with the Cardassian war, and was finally put to bed with the Borg invasion. Starfleet decided to once again build a combat fleet, and after the Dominion war concluded shipbuilding tech from the Dominion assisted in this process. The Federation maintains two separate space fleets in operation, the standard Starfleet, peacekeeping, defense and exploration, and the expeditionary fleet (3rd Fleet) under the Starfleet Marine Corps, a purely offensive fleet.
The Romulans believed in smaller ships in greater numbers all the way up to a protracted war with the Tholians, after which it was decided that an expansion of the Empire was in order, as well as the large capital ships to support it. Now, the focus has once again shifted to smaller attack vessels after the Dominion war, while maintenance of the deep space capital fleet remains a priority.
The Cardassians limited thier fleet development to smaller capital vessels due to supply contraints, but started many designs with the Dominion alliance. After a long recovery from the war and assistance from the Federation to rebuild Cardassia, the Cardassian fleet, using Dominion shipbuilding technology, is once again a force to be reconized and respected.
Some of this is conjecture or created by myself, looking all the way back to the TOS days. Across the different movies and shows you can see concerted shifts in manufacturing tradiitions in all of the major players, for one reason or another.
By the way, here is the latest on the Hendor....still have alot of work to do, including nailing down the size of the ship so I can size the bridge properly. Once I get all of the little details taken care of, I will show all three versions of this ship.