One thing to consider when comparing the number of million sellers over the life of the platform is the amount of years involved.
NES (Famicom, actually, if we're talking "Japan"), especially, lasted many more years, because the 'competing new platform force migration to new generation' didn't kick in for years, and that'll be especially hard to match. And million sellers per year is a better metric for gauging the power of a platform, than sellers over lifetime.
NES (Famicom, actually, if we're talking "Japan"), especially, lasted many more years, because the 'competing new platform force migration to new generation' didn't kick in for years, and that'll be especially hard to match. And million sellers per year is a better metric for gauging the power of a platform, than sellers over lifetime.