It depends. Many global open source development projects are very, very, successful. There's no office there. If anything, a fully remote set of developers s

It depends. Many global open source development projects are very, very, successful. There's no office there. If anything, a fully remote set of developers should encourage a significant uplift in information transfer via design and documentation. Walking across the office and asking 'the guru' how X works, means there's little incentive to share that knowledge, simplify the code, and document it. And that's a problem that has existed in most companies forever. "Juniors" should be self-starters, and the 'interaction' is often and frequent code reviews.