I walked that basement corridor route so many times, as a fast and non-freezing/slipping route to grab food late at night, before going back to the lab.
As an alum living in Cambridge, I don't get the urge to go back into the buildings, but not being able to does give the feeling of one fewer positive connection remaining to MIT.
that was literally my thought looking at the map as someone who moved away in 2019. That walk down the infinite corridor, then dropping into the tunnels when I hit the Chemical Engineering department and popping out at MIT Medical was one of my favorites.