I am curious too. I have used Stan extensively. I found it extremely polished and pleasant to use. It generated very efficient samplers for particularly weird

I am curious too. I have used Stan extensively. I found it extremely polished and pleasant to use. It generated very efficient samplers for particularly weird (and enormous!) hierarchical models I had. Documentation is also great. It is also worth reading Andrew Gelman's post about Prophet: https://statmodeling.stat.columbia.edu/2017/03/01/facebooks-prophet-uses-stan https://statmodeling.stat.columbia.edu/2017/03/01/facebooks-...