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I think the real problem was not the stores so much as their clientèle. Most DM stores were and are still nerdboys' clubs and girls -- who are buying up most the tonkoubon these days -- don't feel comfortable going there. There are exceptions, I know (the aforementioned Time Warp for example), but manga had to blow off the DM to find their customers in bookstores not because DM stores weren't ordering the books, so much as because DM nerdboys weren't buying enough of them.
Tell me about the future. Tell me what the future looks like. Tell me what you want the future to be. Tell me what you want to be in the future.
In previous times, people have had to form salons, committees and secret societies in order to attempt to induce the future. Is this what is now required? Have you ever considered this? Are we still too chained to our Elder Gods, even now, to really want to bring on a big dose of The Shock Of The New?
I'm holding out hope that the handful of really good DM shops will thrive well enough to get successful imitators and the landscape will change for the better. Meanwhile, folks like me have to figure out how to make money in comics in spite of the DM.