I'm right next to the kitchen, but if I were far from it, I'd have a fridge first, microwave only if enough space. For me, hot drinks seem to stay hot enough in an insulated container, but a warm diet Coke is no fun. I try to only have water near sewing projects, but sometimes I need the vitamin DC. A microwave might be a beacon to others to make popcorn, which smells and is greasy. But in a large, fab, dream studio, maybe. But then it would also have a sink, maybe instant hot water for tea.