JS is a language, and my opinion is that languages should be maximally flexible. They must be maximally flexible because a language has the primary function of being the medium through which an individual might transmit their ideas. Since ideas are not limited, languages must not be limited. Server-side JS is still a language. Limiting the language will limit what can be expressed in that language. So, yes, I would say it extends to server-side JS. By simply moving expression upstream it does not change my opinion.
There is that saying, "The Medium Is The Message." The more restrictive the medium, the more restrictive, the more pre-defined, the message is by default. The less restrictive the medium, the less well defined is the default message.
There is that saying, "The Medium Is The Message." The more restrictive the medium, the more restrictive, the more pre-defined, the message is by default. The less restrictive the medium, the less well defined is the default message.
https://en.wikipedia.org/wiki/The_medium_is_the_message