I agree, but I also think it's also an issue (particularly with the popularity of social media) that people are often trying to keep in contact with many more people but also interacting a lot more than in the past.
For instance, I know people who were part of the greatest generation that would have decades long pen-pal type relationships with people they hadn't seen in person in years. It was pretty common for them to send several long hand written letters to several of these friends every year, for 30, 40, 50 years. But I don't think I've encountered anyone in younger generations who would do that.
15-20 years ago, I had a number of e-mail acquaintances who I'd send long e-mail to every few months, and they'd send another long e-mail in return. This went on for years, but with the increase in popularity of social media, these exchanges dwindled into nothingness.
Likewise, I remember when almost everyone I knew was on AIM. But that became old fashioned, for some reason. Not for any particular reason; people still can and do communicate with text messages, and it was no extra effort to keep an AIM client running in the background. But when something new comes along, there's usually an exodus from the old.
Up until recently it seemed that Facebook was the platform to communicate, and it had a very specific, shallow form of communication sent to everyone. Though now even that seems to be dying down.
Mst people are driven by social trends at large. If you sent a handwritten letter to an acquaintance at one point in time, you'd get one in return. Likewise with a friendly e-mail talking about your life. Nothing we have now is really a replacement for e-mail, but it's more trendy, so the old form of communication gets completely neglected.