Have social media had their day?

I've just published the first edition of my re-launched newsletter (www.mwls.com/newsletters/2015-01.php). It's been a long time since I published a newsletter - partly because I didn't have a good method for distribution, opting-in and opting-out but the main reason was that social media seemed so fashionable. So what's changed? More: http://www.mwls.com/news.php?n=216