they just want to ban it in future, but that could be absolutely temporary decision.
True. Also the miners will have a pretty long amount of time to move their mining equipment to another part and avoid problems or issues there. At least the big ones.
I don't think that it will be the biggest issue because of that reason and also because other miners will see an opportunity there and the rate will still be somewhat alike in the growth over time. I could be wrong, time will tell.