We had some fast battleships that were mechanically young that could be brought back into service for a fraction of the cost of a new ship. They would be much tougher and as gun platforms far more lethal to boot (guns are still dirt cheap for delivering serious hurt). They had more than ample space to take whatever we needed to put in them for a support ship (our surface navy is inherently carrier based and that wasn’t going to change).
I doubt claims the cost of replacing 80s era electronics is the issue with them seeing more service. The issue seems to be their guns. If used to the point of wear we do not really have the capability to replace the barrels anymore, or so I’ve heard. Replacing one or two big turrets with something else WOULD be pricey because the space is so well suited to what presently occupies it.
In short, our fast battleships are a bit like the A10, only the cost to replace them in the service they could perform is over the top by comparison.
Humorously: the air force has no real issues relying on bombers older than most any serving general ... an attitude I’m tempted to think our admirals don’t share.
The problems with the old BBs goes FAR beyond electronics and Guns.
The entire power plant is unserviceable. Electrical generation and distribution. Plumbing. Air Conditioning is NOT an option. Air filtration to protect against NBC warfare.
There a litany of issues that would make it cost prohibitive. Even to filed a marginal platform.
I'm pretty sure the [original] milling equipment was sold to the Chinese in the 1990s.