I worked in the ski and snowboard industry for years and saw a similar scenario go down in the last few years. It starts with selling direct at MSRP, which leads to few direct sales for the manufacturer, so it doesn't piss off the dealers as badly as selling direct at MAP(Minimum Advertised Price, usually street price). Dealers don't want to drop certain brands because in some areas those brands are synonymous with the sport, like coke=cola. The end buyers who are really in the know are few and far between. Real skiers and snowboarders know there are much better competitively priced options out there just like we bassists and guitarists know there are better products than Fender from a number of smaller brands. Problem for dealers is the general public doesn't know that since their favorite riders are on Brand X and they are constantly bombarded with advertising for Brand X they just assume it's the best. So dealers try and hang onto Brand X while they get squeezed for higher minimum buys, lower margins, required purchase of accessory lines and overpriced clothing swag. I've seen Snowboard shops where 70-80% of their wall was composed of boards, boots, bindings, helmets, clothes and accessories from one vendor under several brand names.
What ultimately will cause dealers to bail is when the companies sell direct at MAP. I saw one major ski company go out of business quickly when they tried it. Another thing that happened was the opening of factory outlet stores. Imagine if you were a dealer for 20+ years for a snowboard company that was basically a garage business when you first became a dealer. Now they are not only opening new dealers across town from you but just put in a factory store down the street.
It will be interesting how this plays out in the music industry. Selling custom guitars direct is one thing, selling production guitars at MSRP is another, and if they progress to selling direct at MAP I would think most small dealers would have to drop them. Enter the factory store maybe to take the place of dealers? I dunno, it could be a brave new world.