Aside: improvements for 5.0 haven’t come out yet but some updates should be available soon in 5.0.1 and 5.0.2—those releases should have things that were found after the code freeze for 5.0 but that we still want to include quickly and also updates for any problems found right after 5.0 was released that weren’t anticipated ahead of time. People who run the new versions right away and who also report bugs they find quickly really help the process in addition to the testing that is already done, especially because there are so many different setups and configurations of WordPress out in the world.