Like what newer AIOs? When I say the 13900K can barely handle the thermals with an AIO, I am talking about 360mm. You should try a 280mm AIO and update here. I am keen to know your results. There is no such thing as an AIO with a thicker radiator. You only can select these options if you do custom watercooling. And we have reached the limit of AIO efficiency for a long time. Unless you know something I do not about newer AIO technology that is coming out, your misplaced trust in thinking newer AIOs to handle the 13900KS will be costly lesson. But you are welcome to try it. I think everyone here also is eager to learn what happens if you use a 280mm AIO or a newer AIO on a 13900KS. Don't be surprised when you see 100 degrees on Cinebench R23 load. Then my only reply to you would be I told you so.
I was thinking of the Hyte Y60 case which gives that limit of 280mm. Of course beyond that will need a larger case to accomodate the larger radiator.
You replied too fast. Chk out my other options in the same post
Have to check the LL Dynamic O11D Evo case then