Do you plan to include python in your roadmap in near future (I can possibly help if you don't have in-house expertise on it ;), or choosing to avoid competing with Tensorflow?
I suspect Python would be fairly popular amongst companies looking to build deep learning based products.
That will allow us to benefit from what that community is building in terms of neural networks. We want to be the "deployment path" for those kinds of models while we focus on making c++ on the jvm as fast as possible.
We basically focus on the hadoop and spark crowd. We're already the industry standard in java/scala:
I suspect Python would be fairly popular amongst companies looking to build deep learning based products.