It still works if the ship has been somewhat disabled. They have hit off shore oil platforms, and targeted land targets. Where you want something done, but don't want to waste a missile, and its not yet so secure to send a demolition team over to blow it up. It's in that grey area is does well.
The 5"has been able to take out drones. It was always a dual purpose calibre.
USS Carney executed a whopping 51 engagements of Houthi drones and missiles during its deployment to the Red Sea.
www.twz.com
I don't think the 5" is going anywhere. The one thing we have been able to scale is cannon and artillery rounds in production. The italians love guns, and often have multiple calibres, at least with the 5"you get decent power and decent range.
We tried to sell CEAFAR. It didn't really go anywhere. Last I heard we were talking about some sort of joint development options. Not that its not good, but Australia's wants for the largest and most powerful radar, really don't suit other navies ships and priorities. However things in this space can change.
IMO any Air warfare ship is highly likely to be an embiggend Hunter. It already has the fitout for it, we are already building it. A unique AWD design for just 3-4 hulls isn't worth shitting all over the production line for. We know the design can scale to 64 or 96 as is in just a reconfiguring of the existing structure. If it was lengthened, it would be low risk, lots of commonality, and it would be able to fitout with very large missile loads of the larger long ships that are planed in europe and else where (128Vls).. It probably wouldn't carry that much, more likely 64 + 24 larger VLS cells