"And 99% of the time the answer will be a locally running process" Depends on the environment - for years I used either an HP X terminal or a PC running an X s

"And 99% of the time the answer will be a locally running process" Depends on the environment - for years I used either an HP X terminal or a PC running an X server and the one thing I could be confident about in both cases was that the process wasn't running locally. Mind you - that wasn't recently!