I have purchased games from Michael for some time and I've gotten to meet him at several retro gaming events. He's a great guy but he doesn't hang out in the forums much. The best way to reach him if you have a question is to email him. He responds quickly.
I noticed the same thing at the event. It is a change in generations. Those of us who were kids for Atari, Intellivision, ColecoVision are now older. We lived through the whole thing from start to present and our nostalgia is different. The kid who first saw video games with the 16-bt systems are now older and, for them, that's where games started. They really didn't know anything else.
The internet has also changed things and now meeting YouTube celebrities is a big thing for many. I was at the Imagic panel also and it was pretty empty. Yes, it was fun for those of us who lived those days but those days are long past for many of the younger games. It's too bad they are not as interested in learning about where things started. Maybe that's something the YouTube folks can focus a bit on to see if it generates interest.