Win95 didn't fit in 4 megs all that well. But that's neither here nor there since we're in a parallel universe in which MS started working on Nextstep in 1985 and released a consumer OS based on it in 1995. This seems totally plausible. Next Inc was never really making a consumer OS. In 2007, Apple shipped a Nextstep derivative that ran in 128 megs while its desktop (and consumer) counterpart wasn't really happy with anything less than a couple of gigs.