Indoors, but doing what? Scotty was manning some sort of a workstation, equipped with generic devices dedicated to processing information. What was he doing
if not paying attention to the biggest event in local history?
And Vulcan would stay
gone. If Scotty was worried about not having chat partners, shouldn't he be particularly worried about losing his daily "Vulcan Space Central testing communications with local station Delta Vega, over", even if it were always delivered with emotionless monotone?