For the first 4 LCS, they were only design to last bout 10 15 years.
They were prototypes to see which design was best when Lockmart decide to to throw a fit on how their was not picked.
Long story short Austal still won, Lockheed had congress force their design anyways.
Either way the first 4, two Austeal Independence and two Lockheed Freedoms were always going be retired fast since they were prototypes.
Whike with most of the other LCS looking at being retire is of the Lockheed Freedom class cause their gearbox were poorly designed and made, ironically cause they switch from USA made to German. With the cost to replace the gearbox being on the order of buy a new ship its cheaper.
While the Austals Independence class been actually working well with minur issues. Some cracking in their aluminum hull plating. Which is painfully normal for Aluminium in watrships to do and says something that it took nearly ten years for it to become a noticeable problem instead of right after launch like on the Ticos and Perries.