To me the full screen feature is really useful. I work with my notebook in a stand right by the side of an external display. On the notebook I keep everything in full screen mode except for the VS Code windows, which stay in the other monitor. When I need to switch from browser to Slack, Spark (email client) or Spotify, I just have to swipe with two fingers on my Magic Mouse or with four fingers in MacBook's Magic Trackapd.