Many of the challenges could be reduced or mitigated if the pods could be at least partially pressurized to reduce the pressure differential between the inside and out -- but that introduces another complexity -- can the server hardware handle it.
There are quite a few engineering challenges, none of them unsolvable but also none of them seem necessary when it seems the same benefits can be obtained for less effort by keeping the pods above water.
Many of the challenges could be reduced or mitigated if the pods could be at least partially pressurized to reduce the pressure differential between the inside and out -- but that introduces another complexity -- can the server hardware handle it.
There are quite a few engineering challenges, none of them unsolvable but also none of them seem necessary when it seems the same benefits can be obtained for less effort by keeping the pods above water.