why do they have to maintain two in future? s60 no longer as to be maintained by nokia as its dead and all code is/will be contributed to symbian foundation for the new unified symbian platform, where it will not be there sole responsibility to maintain. btw you forgot about s40 from what I've read in the future sometime symbian will replace it on low to mid priced devices so they will have gained 1 platform and lost 1 1/2