Technically, that might have been what those who designed and engineered the OCA hulls considered to be so at the time - but as the Aurorans gradually proved, there was plenty of life left in the old Terran design yet!djdood wrote:Bottom-line, it was an old (if enlarged) hull design that was nearly at the extreme upper limit of what it could be pushed to. There was little room or capability left to expand or update it and military equipment always needs room to change to compete with emerging threats. If it can't, then it will be pushed-aside for something that can.
The Aurorans not only developed their own Armoured Cruiser (CLA) design derived from the CL model, but eventually managed to build both larger Battlecruisers and much larger again Dreadnoughts, which served to defend the Federal Republic during some of its most critical junctures.
(But on the other hand, the Aurorans had to rely on the Terran-hull ships for their fleet, as they had no access to production facilities suitable for saucer-and-nacelle Star Fleet designs. Even so, it is to their credit how they made such virtue of their necessity!)

