Shall name-based virtal hosting be used in a web server even only a single website is hosted on the IP address

This is a web server security question. Shall name-based virtal hosting be used in a web server even only a single website is hosted on the IP address ?  The typical cases are www.hkexnews.hk and www.hkex.com.hk.  The  websites  respond to clients even the HTTP headers do not contain a hostname, just an IP address only .  The answer to me is quite obvious.