- lots of information is ambient at the team place
- because not all people are that concentrated at home
- because working alone is difficult sometimes (especially when you're under stress)
- because you're harder to contact (yes, some people are afraid to call a colleague at home)
- because people don't like to have 4 simultaneous chat sessions with colleagues
So a day of remote work certainly help, but I'd venture to say that's a maximum for many. Of course there are people who a re remote 100% of the time, but not everybody can do that. You have to love your work for that, and many people don' t /love/ their work...
