Will Robertson wrote:
> On 29/01/2011, at 4:38 PM, Joseph Wright wrote:
>> On 'things blowing up', can you provide an example?
> I think Arno just means the difference in number of characters between
>     \def\ie{i.e.}
> and
>     \NewDocumentCommand \ie {} {i.e.}

Exactly. It's fine that l3 is more verbose in cases it helps. But for
just this kind of definition, it is total overkill and not usefull. In
this case, especially the empty braces are totally strange.