Whitecold wrote:
No one wants to replace all DD's with Sag-C's now, it is only that in the future it might become impossible to build an effective combatant lighter than a Sag-C. That future threat environment includes DDM-armed opponents, and at that point that hypothetical new class is no longer overkill, but the very minimum you need for a hyper-capable warship.
You could still build lighter ships, but then you could still build frigates, but no one is doing that, because it is a waste of resources.
The point is that there´s a lot of missions that needs to be done that does not require a warship capable of standing up to "itself".
Missions where a handful or even a single LAC would be plenty enough, but requires a hyper capable unit.
Frigates are obsolete because if you´re already building a ship that big, you might as well make it big enough to be a DD instead.
But going from 100-150kt DDs as the smallest unit to a 450-600kt range as the smallest unit, that´s going to hurt both construction times and costs noticeably.
And a Roland gets away with a crew of just 62, while a Saganami-C uses almost 6 times that. Even without the marines, it´s still over 3 times the crew. And what is it that Manticore is currently in need of? Crew.
*****
I guess I just think the set of places where
1) you want a presence in a system
AND
2) a Sag-C-sized ship is overkill (or you need multiple ships and multiple Sag-C-sized ships are overkill)
AND
3) there's nowhere to operate a few LACs from / it's impractical to ship said LACs there / it's impractical to station a carrier there
is pretty small.
Experience both from the books and from reality says the opposite.
And now with a HORDE of potentially hostile systems, the need becomes even greater, as it will become drastically harder to keep enough scouts out around enemy and neutral systems to avoid any "interesting" surprises.
Two Roland are cheaper than a single Saganami-C in just about anything.
Wether they cannot stand up to "real combat units" or not is actually irrelevant, as noone expected an old style DD to stand up to heavy fleet units anyway.
Strategic presence, strategic scouting and any kind of patrolling that doesn´t expect the ships to engage a more powerful hostile (which noone would expect anyway); Manticore is an empire now, they have LOTS of space that needs presence more than it needs lots of bigassed superduper fighting capable cruisers.