>
> > just having a string-concat alias could improve the situation.
>
> But concat is not only about strings.  Will we have 3 different
> aliases?  And what ab out the case where each argument is of a
> different type?
>

I think "seq-concat-to-string" is a better choice here. We can remove the
"to-string".

That or "seq-join" with a default separator to "" ?