I think it also makes a difference if you work with people across different timezones or not.
Regular chatter might be good enough to communicate between people in roughly the same timezone. However, If I send an unclear chat (or email) to a colleague who's starting her day when mine has already ended, she can't act on my message and we'll have to waste another day clearing up that miscommunication.
Regular chatter might be good enough to communicate between people in roughly the same timezone. However, If I send an unclear chat (or email) to a colleague who's starting her day when mine has already ended, she can't act on my message and we'll have to waste another day clearing up that miscommunication.