[Veedrac]

I would be surprised if Cerebras was trying to handle any recurrence inside the overall forward/backward passes. It seems like a lot of difficulty (as mentioned) for peanuts.

I don't get your point about training. Yes, it's backwards rather than forwards, and yes it often has fancy stuff intermixed (dropout, Adam, ...), but these are CPUs, they can do that as long as it fits the memory model.