I was big in to DVDs right after I graduated college. I was in a major funk and very aimless, but I had taken graduation money and bought a DVD player a receiver, and some new speakers, and was so excited for this new format. I had been on the widescreen format for years, and would argue with people how it was the way the film should be presented. I didn't have much money, and didn't have cable TV, so bought movies from the bargain bins and second hand stores, and rented them from Hollywood Video. I watched all the bonus features to the point where I, in retrospec, would often see too much about how the sausage was made. These got me through many years of loneliness.
By the time Blu-Ray came out, I was not so focused on film and home theater, and was starting a family. I had stopped buying movies, though still received them as gifts. I own maybe 10 BDs. There was no way I was going to restart collecting films in a new format.