We do not believe that WPF will be dead by 2022 considering that Microsoft has already announced plans to add WPF functionality to the .Net Core 3.0. They are also working on validating and merging community pull requests.
WPF has been a terrific framework for desktop app development, with amazing capabilities that assist in UI creation. Not to mention WPF's invaluable contribution to desktop app development, particularly when it comes to rendering apps quicker. WPF offers features such as animation, 2D, 3D graphics, data binding, typography, styles, etc., and uses XAML (Extensible Markup Language) to define views declaratively.
WPF support added to .NET Core may not make much of a difference in WPF stability. However, it could have less modifications in future versions. WPF would be an alternative depending on the requirements of a new project. Be it what it may, having a choice is always beneficial.
To learn more, let's take a close look at expert predictions for WPF's future.