https://m.windowscentral.com/microsofts-next-attempt-windows-phone-wont-include-silverlight-apps

As Windows Central has been reporting on for several weeks now, Microsoft is not done with its mobile efforts, and internally has already started work on its next attempt at a Windows powered phone platform. For a while now, I've been hearing whispers that Microsoft's next attempt at Windows phone won't include support for older, Windows Phone 8.1 Silverlight based apps, and today more evidence for that has come forward.

Thanks to a screenshot from @gus33000 on Twitter, we can now see that Microsoft has already developed a temporary popup for when a user tries to open a Silverlight app on a build that doesn't support it. The popup says "Silverlight apps are no longer supported on this version of Windows." What does this mean for you? It means that when Microsoft is ready to launch its next attempt at Windows phone, older apps like WhatsApp and Slack will not work.