>>98716
Back in the day when the Game Gear came out and it was in color, GameBoy was still B&W (or rather, various shades of green).
Nintendo would release the GameBoy pocket before it went color. Why? Because as long as a product sells, you don't put out a better version. You first squeeze every single customer out there who is willing to buy it, and only then you release the "improved" version, so that they will give out their cash again.
It's basic marketing.