Responsive architecture envisions the built environment to adapt to the changing needs of its occupants dynamically. Although it is increasingly feasible to move space-defining objects like room dividers by mobile robots, little is known about how or when such spatial adaptations should occur. We therefore measured the experience of 26 occupants while they performed six different activities inside an office breakout room that was being adapted by a robotically moving wall in either a reactive or proactive way. Based on these empirical findings, we propose how autonomous spatial adaptation should primarily aim to balance the spatial, situational and subjective qualities of the resulting sense of place. We also define eight distinct design recommendations that exploit the unique affordances of spatial adaptation. By asserting that future advances in human-building interaction (HBI) should be based on creating appropriate places rather than controlling functional spaces, we foresee how responsive architecture might become as compelling as its static counterpart.