is "import std;" a valid approach or a violation of the D programming language?

[Andrei Alexandrescu]

On 5/15/21 9:59 AM, Witold Baryluk wrote:
> I think `import std;` shouldn't be used for scripting. It just makes 
> startup longer (which is important for scripts), and makes you 
> vulnerable to future conflicts with new symbols in Phobos, which is a 
> reality in anything other than most trivial scripts. Sure, it is a good 
> start in rush to start with off, but nothing more.

One reason why import std is expensive is that it instantiates a bunch 
of templates (even if not used). That can be seen with -vtemplates:

https://run.dlang.io/is/MT6hvE

I think we can improve on that.