I kinda think this is a non-issue. If you are working at the level of Keras then the back-end is pluggable. You can use a fancy GPU relying on a binary blob, yo

I kinda think this is a non-issue. If you are working at the level of Keras then the back-end is pluggable. You can use a fancy GPU relying on a binary blob, you can use PlaidML to use any random GPU, you can use CPU as a last resort. The Keras code is all the same, you just set the backend you want in an environment variable.