The change addressed in “You’ve got mail. Do you care?” (Page A1, March 30) is indeed noticeable. But what is most interesting about it, I think, is that the switch from e-mail to social media leads to a drastic change in the quality of communication.
Leaving spam aside, an e-mail (just like the good old letter) used to be written often with one addressee in mind. What I might post on Facebook or Twitter, however, is from me to the world. The focus is not the other person, but what I want a fairly large group of people to know about myself.