I think communication is critical to the success of students in school so that parents know what's going on in the classroom. That being said, it's not practical for teachers to discuss each day individually with each parent, but sending out mass emails about what went on that day or posting information on a website can be very helpful to parents.
However, while I think the communication needs to continue through the school years, I also think that it should taper off as students get older. When teachers email the homework each night to parents in middle school or high school, the students quickly learn that they don't have to write it down which can be a bad habit.
So, while the messages may change and the customization isn't unique to each student, it is important to have regular communication between teachers and parents!