MySQL 8.0 has made several major changes that can benefit the operations of your database instances. InnoDB Cluster provides highly available, fault-tolerant clusters with features like InnoDB tablespace cloning when starting new servers in a cluster and log compression. The data dictionary provides the ability to have millions of tables in a schema. Histograms are similar to indexes in that they help the optimizer retrieve your data but do not have the overhead associated with indexes. Add in CATS (not the musical or movie), resource groups, improved performance, UTF8MB4 optimizations, and you are just scratching the surface of the new features found in MySQL 8.0.