TPUs don't have enough memory either, but they have really great interconnects, so they can build a nice high density cluster.

Compare the photos of a Cerebras deployment to a TPU deployment.

https://www.nextplatform.com/wp-content/uploads/2023/07/cere...

https://assets.bwbx.io/images/users/iqjWHBFdfxIU/iOLs2FEQxQv...

The difference is striking.

Oh wow the cabling in the first link is really sloppy!