Yes, it's me. Not sure how you know who I am. :) Re: being put into mass production after PONG, that's certainly true but your article specifically states development was tied to the home PONG earnings. While they certainly helped the company, Atari was chiefly a coin-op company and the earnings from coin are what drove anything financially at the company in that period - until Warner (with it's deep pockets" bought it during the Summer of '76.
Actually the 2600 was in development before PONG even hit store shelves. And the 2600 was not the longest lifespan console. Support for the 2600 was cancelled on Jan 1, 1992. Nintendo's Famicom (released here as the NES) was in production from 1983 to 2003.