As far as I understand, a commlink can communicate with about any device without cables and stuff. But do you need a datajack to have real hot-sim VR? If not, what piece of cyberware do you need? There is the internal commlink but I think the idea that every time you want to upgrade your commlink you would need serious surgery... no, thanks... What about the "internal simmodule", the description is not very clear, can it connect to an external commlink or do you still need a datajack?
It seems a bit "oldschool" to connect your commlink to your head with a cable... When everything else is wireless or skinlink. What is the wireless equivalent of the datajack?