I mean yeah, but I doubt its going to be mainstream anytime soon.
At the moment its cheaper to just use forced air, and yolo it. Running at half density is expensive, but not as expensive as backfilling everything with liquid cooling.
Also given that we've been able to run 2 socket blades at full bore without liquid cooling kinda suggests its not actually needed.
Having radiators on the front/back of the rack directly works really well. We had it on our render farm. combine that with enforced hot isle/cold isle and you can reduce the need for aircon dramatically, without multiplying your leak risk by at least 96 times.
The massive problem here is that its really difficult to hotswap anything. Those cooling pipes need to be removed before you can pull out the server. Unless they are self sealing (like hydrolic lines) then you need to drain the loop first. That costs a shitload of money at scale.