Why would one use Task over ValueTask in C#?

Question

As of C# 7.0 async methods can return ValueTask. The explanation says that it should be used when we have a cached result or simulating async via synchronous code. How

Answer 1

A more recent info from Marc (Aug 2019)

Use Task when something is usually or always going to be genuinely asynchronous, i.e. not immediately complete; use ValueTask when something is usually or always going to be synchronous, i.e. the value will be known inline; also use ValueTask in a polymorphic scenario (virtual, interface) where you can't know the answer.

Source: https://blog.marcgravell.com/2019/08/prefer-valuetask-to-task-always-and.html

I followed above blog post for a recent project when I had similar questions.