Certainly it would make a lot of sense to retain a design that adequately performs a space survey function - because space does not evolve. If an Oberth is good for charting nebulae in AD 2279, it should be good for the job in AD 2379, too, even if with a modernized sensor suite. Or in AD 123,456,279, for that matter.
The 24th century would also have done away with issues such as availability of spares. Such availability would no longer depend on the continuing existence of original tooling, because tooling would now be generic, and any factory churning out the latest in combat starships could churn out exact replicas of 2130s-vintage warp regulators as well.
Also, a 23rd century starship design would already be the result of thousands of years of development by UFP member cultures, plus a hundred years of integration work between those cultures. A mere additional century would hardly outdate the design to any significant degree, if the general lack of radical progress in warp drive between TOS and TNG is any indication.
Timo Saloniemi
The 24th century would also have done away with issues such as availability of spares. Such availability would no longer depend on the continuing existence of original tooling, because tooling would now be generic, and any factory churning out the latest in combat starships could churn out exact replicas of 2130s-vintage warp regulators as well.
Also, a 23rd century starship design would already be the result of thousands of years of development by UFP member cultures, plus a hundred years of integration work between those cultures. A mere additional century would hardly outdate the design to any significant degree, if the general lack of radical progress in warp drive between TOS and TNG is any indication.
Timo Saloniemi