Want reasonable reference counting? Disable automatic sharing of immutable

[Ola Fosheim Grøstad]

On Monday, 15 November 2021 at 08:38:07 UTC, Ola Fosheim Grøstad 
wrote:
> The reason you can cast away const is so that you can call 
> C-APIs that actually have const-behaviour, but not a const 
> signature.

Also note that objects that are created as const should not be 
modified, quoting 
[cppreference](https://en.cppreference.com/w/cpp/language/cv):

«const object - an object whose type is const-qualified, or a 
non-mutable subobject of a const object. Such object cannot be 
modified: attempt to do so directly is a compile-time error, and 
attempt to do so indirectly (e.g., by modifying the const object 
through a reference or pointer to non-const type) results in 
undefined behavior.»