in vs inout

[Arredondo via Digitalmars-d-learn]

The recent change log for v2.092.0 Beta says that with the new 
implementation for the `in` storage class:

`in` should be the storage class of choice for purely input 
function parameters.

I had been using inout for some time now for "purely input 
function parameters". Is there a case to be made in favor of 
const? why would be scope const preferred over scope inout?

Cheers!
Arredondo.