This, 100%. When engineers have focus, no context switching... things get done. When they're interrupted with useless Zoom meetings every 2 hours, productivity

This, 100%. When engineers have focus, no context switching... things get done. When they're interrupted with useless Zoom meetings every 2 hours, productivity drops off the cliff. If you have 2 meetings 1 hour apart, that 1 hour is basically useless: by the time you're in the zone, you're interrupted again.