> But Nokia’s Lumia smartphones haven’t sold very well. So why give away its secret sauce to rivals? Providing SDKs for multiple platforms is not 'giving away

> But Nokia’s Lumia smartphones haven’t sold very well. So why give away its secret sauce to rivals? Providing SDKs for multiple platforms is not 'giving away secret sauce', it's just selling proprietary stuff in a different way. Offline support was announced by Google months ago in their 'afraid of Apple' media event. 3D maps are already done by Apple and everyone has already discovered that they are no silver bullet, and need more explanation for why they're useful. As one friend put it, they're the MacGuffin of maps: everyone feels motivation to have them, but for no big reason.