You mean the article or the feature?
The article is dated by 22/11/2014.
The feature may have been added a few months/years ago, but the point still stands about systemd showing signs of feature creep. Note also the DNS resolver issue[0]
The DNS issue is worth in systemd's resolver because it is NOT merely a "stub resolver" - it implements a cache. From the same thread:
"The DNS specification does not require rewriting of upstream responses to filter out parts for which the queried server is not authoritative. This means that a downstream caching resolver will tend to poison its cache if it adds data from such responses that are not directly in response to the QNAME."
[0] - http://seclists.org/oss-sec/2014/q4/592