On 2.1, I am getting backend errors atm. For instance, with the unet:
> torch._dynamo.exc.BackendCompilerFailed: backend='hidet_backend' raised:
NotImplementedError: hidet: Tensor.to(..., device=...) is not supported for symbolic tensors...
Early torch 2.0 was full of backend unimplemented/unsupported errors too, but I can't even remember when that was all implemented and the dynamo issues popped up (or even when everything started working) since I stayed on torch nightly.
But inductor/triton didn't work in the 2.0 nightlies either, and now it works fine for SD.