Funds must be tight so the Navy is unwilling to spend the extra $100M to upgrade the USS Fitzgerald to Aegis Baseline 9.0.
I'm assuming that so long as there's another ship with AB 9.0 nearby in a CEC network then DDGs with earlier AEGIS versions will benefit from the former. It could be a concern though when it's sailing by it's lonesome.
https://news.usni.org/2017/10/16/u-...ald-baseline-9-aegis-combat-system#more-28800
USS Fitzgerald (DDG-62) won’t be upgraded to the latest version of the Aegis Combat System when it completes its repairs following a collision with a merchant ship off of Japan, according to Naval Sea Systems Command...
Fitzgerald was already scheduled to undergo a midlife upgrade in Fiscal Year 2019, though the Navy intended to conduct a scaled-down availability that would cover hull, mechanical and electrical (HM&E) improvements but not a combat system upgrade to Baseline 9. Following the collision, despite the need to replace portions of the ship’s combat system, radar and electronics, the Navy decided to go along with its original decision to keep the ship in a legacy configuration instead of upgrading to Baseline 9.
“There are no additional DDG-51 Flight I ships planned to receive Baseline 9 upgrades. The USS Fitzgerald (DDG-62) is capable of performing Ballistic Missile Defense (BMD) operations and is planned to receive all FY19 scheduled alterations to include HM&E, [command, control, communications, computers, cyber and intelligence] and BMD upgrades during the restoration availability,” reads the statement.
The planned HM&E availability is estimated to cost about $170 million and will retain the legacy military computers instead of upgrading the destroyer with modern servers. The full mid-life upgrade for a destroyer would have cost around $270 million
In total, the final cost for the repair for Fitzgerald is estimated to run about $367 million and take more than a year.