Questions on the new __traits(parameters)

[Elronnd]

On Thursday, 10 March 2022 at 15:08:11 UTC, Steven Schveighoffer 
wrote:
> *snip*

I was a bit on the fence regarding the issue, but this is what 
convinced me.

The issue is primarily one of abstraction and modularity.  It 
should be an implementation detail whether a given object uses 
opApply or range APIs.  It should be possible to switch from one 
to the other without breaking client code.  I should not have to 
care how the object I'm iterating over arranges to be iterated 
over.