<speculation> I think there are two things: * Precisely calibrating the temperature of a large space is really hard, and people are surprisingly aware of sligh

<speculation> I think there are two things: * Precisely calibrating the temperature of a large space is really hard, and people are surprisingly aware of slight differences in temperature. To me, 68 degrees can feel like "I want a sweater" and 74 can feel like "It's sweltering in here." And preferences vary a lot across individuals * Coming in from the hot to the cold can create a large shock even if the building isn't that cold. If you're outside sweating in hot, humid weather, walking into a cool, dry room will feel frigid at first. Over time, though, it will feel more normal. </speculation>