In my opinion, this legal change is a huge sleeper story that is behind a number of changes in how customers are getting treated. Since customers can no longer economically avail themselves of the courts to protect themselves en-masse, certain companies find it in their interest to exploit that asymmetry for profit.
In other words, a company could always impose a harm on all of its customers for its profit. But, now, if that that company imposes a class ban through arbitration, those customers cannot, collectively, seek recourse for that harm.