I think these are big reasons. Offices built longer ago (if the buildings are still around) designed to let in lots of natural light can be good for this type o

I think these are big reasons. Offices built longer ago (if the buildings are still around) designed to let in lots of natural light can be good for this type of conversion as the floorplates tend to not be so deep. And having higher floors can be good too as people often like that. Another thing is that offices can have worse sound insulation.