Silverlight is still supported by Microsoft - https://support.microsoft.com/en-us/lifecycle?c2=12905
If you're going to bring a plastic knife to a watergun fight, at least point it in the right direction...
You know who didn't (and does not) support Silverlight? Developers!
We moved on from Silverlight well before Microsoft did. That's the important distinction when you talk about sunsetting technologies. Microsoft's track record here is FAR better than that of Google or Apple.