Picture a junior designer stuck on a small problem at home. In an office, they'd glance over, ask a quick question, and watch a senior solve it—implicit learning in seconds. On Zoom, that casual teaching moment evaporates, and they wait days for a scheduled call. Research on tacit knowledge shows unplanned proximity drives a huge share of real skill transfer and productivity. Remote work is excellent for heads-down tasks, but it quietly strips out the informal mentoring and spontaneous problem-solving that offices still do best. That’s the part the productivity surveys never capture.