most important reason. (snip) We know from painful experience that letting a third party layer of software come between the platform and the developer ultimately results in sub-standard apps and hinders the enhancement and progress of the platform. If developers grow dependent on third party development libraries and tools, they can only take advantage of platform enhancements if and when the third party chooses to adopt the new features. We cannot be at the mercy of a third party deciding if and when they will make our enhancements available to our developers. 04ͷϓϥοτϑΥʔϜͱ։ൃऀͷؒʹαʔυύʔςΟͷதؒϨΠϠʔ͕ڬ·ΔࣄʹͳΕɺ ։ൃऀ͕ΞϓϦͰͰ͖ΔࣄͦͷதؒϨΠϠʔͷఏڙऀ͕ܾఆ͢Δ͜ͱʹͳͬͯ͠·͏ɻ ·ͨͦͷதؒϨΠϠʔ͕ΫϩεϓϥοτϑΥʔϜͰ͋ͬͨ߹ɺڞ௨Ͱར༻Ͱ͖Δϓϥοτ ϑΥʔϜͷ࠷খݶͷػೳ͔͠ར༻Ͱ͖ͳ͍͜ͱʹͳΔɻ ͦΕΞϓϦͷਐԽͱϓϥοτϑΥʔϜͷਐԽΛ͛Δɻ