@safe pure nothrow compiler inference

[Kagamin via Digitalmars-d]

On Monday, 29 September 2014 at 14:40:34 UTC, Daniel N wrote:
> It can be done, Walter wanted to do it, but there was large 
> resistance, mainly because library APIs would become unstable, 
> possibly changing between every release.

Huh? Templates are part of library API too, see std.algorithm. So 
what's the difference if the API consists of templated or 
non-templated functions? Why for one part of API it's ok to 
change with every release and for the other not ok?