PiSigma
"the engineer"
In case of a Taiwan conflict large destroyers are generally not very useful other than to prevent other countries like Japan into joining the party.Have a think about a notional conflict over Taiwan. How many ships and aircraft would China need to break through the first island chain (potentially Korea, Japan, Taiwan, Philippines) and obtain maritime superiority within the second island chain?
Then there is also securing chokepoints like the Malacca Strait (and beyond) to ensure commercial shipping can continue to flow freely.
If you run your own models of what China could reasonably be spending in 10 years, you can see that 90 AEGIS destroyers is not top heavy because there are so many more frigates (60+), corvettes (60+) and large coast guard ships (120+) as well.
And the *rule* as I understand it is that maintenance, overhauls and repairs is like buying a ship 3x over.
90+ destroyers, with 60 frigates and 60 corvettes is by definition top heavy. Think of it like a pyramid with the smallest ships on bottom, ur top of destroyers is supported by frigates at 2/3 of size. 90+ destroyers means u would have 100+ frigates and 100+ corvettes to have a balanced navy.
I think 50 destroyers (between 52s and 55s) are more than enough. Because like I said, Indian ocean and western pacific only. Which is area wise about the same as a full pacific ocean, so half of USN strength, it would be more than enough.
Just because China have the capability to build, doesn't mean they will. Historically they have been piloting new designs then once happy with it surge production. I think we will see a slow down eventually before new radical designs are made (not small changes like 56 to 56A) and then a surge again.