“This is the first of many versions of the preview package that we’ll be releasing throughout the year. In the upcoming months, we’ll be improving workflows, performance, and documentation, with the goal of shipping a pre-release version for 2020.2 by end of year. In 2021.1, the UI Toolkit that ships with Unity will be considered production-ready. We’ll continue to make the preview package available to give you early access to features in development.”