ConfigureAwait(false) relevant in ASP.NET Core?

ConfigureAwait only has effects on code running in the context of a SynchronizationContext which ASP.NET Core doesn't have (ASP.NET "Legacy" does).

General purpose code should still use it because it might be running with a SynchronizationContext.

ASP.NET Core SynchronizationContext

What about this?

At this moment (Feb-2020) Developers on MS Blog recommends use ConfigureAwait(false) in order to Improving performance, Avoiding deadlocks.

I’ve heard ConfigureAwait(false) is no longer necessary in .NET Core. True? False. It’s needed when running on .NET Core for exactly the same reasons it’s needed when running on .NET Framework. Nothing’s changed in that regard.