Vivaldi dac no network input..?

I am curious to know why the Vivaldi dac does not have a RJ45 (network input) while the Rossini player and the Rossini dac both provides this input.

It this some kind of technical consideration or just because the product was release much earlier than Rossini and did not include one back then?

The network part of the Vivaldi system is located in the Vivaldi Upsampler.