(Edited this post since I’ve noticed it appears under the blog feed and I’d rather not overburden it 
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The main things I’m looking into at the moment is getting CUDA working, considering the possibility of Tensorflow in the default package (for Keras/TMVA) and identifying where the sandbox is causing issues. Particularly this last bit is the one that presents the most complex problem. Otherwise the snap should hopefully only lag behind the latest releases by a few days at most, so if it’s suitable for you already it should be plain sailing going forward. If it isn’t, please drop feedback and I can evaluate it and hopefully improve this for everyone 