HBO Max subscribers were automatically switched over to Max when the app updated on May 23; some users may need to manually download the new Max app.  Since the entry-level price of the service remains the same during the change, HBO Max subscribers don't lose anything. Instead, they now get access to the vast Max library which includes popular content formerly exclusive to Discovery Plus, like shows from TLC, HGTV, ID, and Food Network.  That said, there is one notable adjustment regarding 4K support. Subscribers to HBO Max's ad-free plan got 4K streaming included for $16/month, but 4K is now exclusive to Max's more expensive Ultimate plan for $20 a month. If you subscribed to HBO Max's ad-free plan before May 23, you'll continue to get 4K support for at least six months before you'll need to upgrade to keep that feature.