Compile times are not a whole lot different than any other large model build. It's a kernel based compilation pipeline and the kernels are simply tiled over a 'core' area in the weight streaming architecture.

I seriously doubt that. What's your source?

I used to work for a competitor with a more flexible architecture and even our compile times were bad (significant fractions of a day in some cases). And we didn't have to do place and route!

I just googled it and it's apparently bad enough that they had to implement incremental place and route.

I used to work at Cerebras. They don't do place and route anymore. That's the old pipeline mode. They've shifted to weight streaming