Years ago I walked into Tower Records and was shocked that their LP collection had shrunk into a corner. The world had changed to CDs without me. Today the same sense of awe strikes me when I receive a print on demand book from Amazon. A book is printed and shipped within days. There is practically no cost for the author to publish a professionally printed book. E-Publishing has evolved to a point that cannot be ignored.
Things that have become/are becoming obsolete: typewriter, newspapers, land-line phones, encyclopedias, film cameras, the Yellow Pages, etc.. I don’t have nostalgic feelings for these things. And for authors, this might just be the golden age of publishing.