[Keflavik76]

The LCS retirements are among 24 vessels, including cruisers and dock landing craft, proposed for de-commissioning to help save a total of about $7 billion.

More money for Ukraine.

[buwaya]

Ships have a service life. Some of the ships up for decommissioning now are here -

https://news.usni.org/2023/03/20/secnav-cno-pushing-plans-to-decommission-11-warships-in-fiscal-year-2024#:~:text=In%20unveiling%20its%20Fiscal%20Year,and%20three%20Ticonderoga%2Dclass%20cruisers.

The cruisers Antietam and Leyte Gulf, for instance, were commissioned in 1987. That makes them 36 years old. Its probably not worthwhile to keep upgrading and overhauling them. The submarine USS San Juan is 35 years old, so ditto.