While for most things density is good. However if you can have a certain task take advantage of this insane switching frequency there could be reasons to build

While for most things density is good. However if you can have a certain task take advantage of this insane switching frequency there could be reasons to build a room or multi-room sized specialized computer. Not everything needs to be tiny for every application. Also path delay is not an issue if you have a task that can be pipelined for raw through put. Latency is less of issue in such scenarios. So claiming there is no use for such things seems a stretch. It certainly can have niche uses. Bigger problem with a lot these papers is their tech needs to be at least reasonable to manufacture to have niche uses.