Wow. This is a surprisingly frank response from Phelps, and I don't know what possible motivation he would have to float it unless the chances of contraction are very strong. Why would you telegraph that, including the "meaningful 2020 changes" and then have nothing much change?
From the broad commercial standpoint, I've long thought that they need to be racing more during the summer, including mid-week, and end the season earlier. Kind of what Keselowski said, but 50 races is probably a tad much.