Elpida might have only held 13% of the DRAM market but their hold on some of the major module makers was considerably larger. Unsustainably so, as Elpida consistently came off on the worst side of the deal in recent years.
In the very short term there will be limited impact on these customers and their channel. But when the new Elpida (or their assets) return to the market, they will be unable to engage with the module makers in the same way or scale as before.