Main problem is a blurring between work life. With one office no one would dare schedule meetings too early or too late in the day. With different time zones yo

Main problem is a blurring between work life. With one office no one would dare schedule meetings too early or too late in the day. With different time zones you might have to have a 7am meeting on the west coast or 7pm on east coast. There needs to be strict calendar blocking to maintain sanity.