GBA killed off too early?

[zorg1000]

Cheebee said:
DS was originally meant to be a 3rd pillar, besides the GBA and GameCube. However when it got those crazy games like Brain Training and Nintendogs, plus the Lite redesign, it simply took off like crazy and replaced the GBA altogether.

im pretty sure it was meant tp replace gba, they just werent sure if the touch screen/2nd screen would catch on so they said that just in case