virtual-by-default rant

[Martin Nowak]

>> This is so much theoretical that I think this should be removed from  
>> the D docs. And to be put back when one DMD compiler is able to do  
>> this. Otherwise it's just false advertising :-)
>
> Is this even possible without LTO/WPO? Extending a class defined in a  
> library you link in (and for which codegen already happened) is  
> certainly possible…
>
> David

This is not even possible with LTO because new classes
could be loaded at runtime.
Could somebody please fix this.