Some giant did enter the market. Stratasys bought MakerBot in a bid to own the hobby space. MBs reputation rapidly diminished before and after thanks to a few boneheaded moves.

What’s amazing to me is how Prusa, the undisputed leader in the space, is fully open source and continues to fully fund itself and research new technologies. They’re the antithesis of what Makerbot and Stratasys are, and are a successful company.