Prior to Steve coming back Apple had a ton of different product lines. You had three or four models of Performa, then two different lines of Power Macs, three different Powerbooks, and even some servers. This wasted a ton of effort and resources maintaining all these product lines.

Steve divided the segments in to four quadrants on two axes: Portable vs. Desktop and Consumer vs. Professional. I think if they'd have started with simplifying their product line there might still be a market for the clones.