Disable Unused Services

Early on we were informed that we could disable iSymphony to save on some RAM since we never use it. Now I am wondering if there are any other services that we can disable if were not using them and if it helps the system performance in anyway. WebRTC and XMPP were the services that started me wondering about this.

If you uninstall both of those modules prosody wont run and the webrtc users will be deleted

Wasn’t considering uninstalling them but instead disabling and if the clients don’t use WebRTC or XMPP how will that impact the server?