JJ, they did support the NES and SNES for a year at least after the release of the succeeding console. Granted more so in Japan than America.
The PS and PS2 sold over 100 million units and a company would be an absolute fool to not continue to support such a huge revenue stream. In fact if you didn't, your stock holders would force you out.
It's a business move, JJ. It has nothing to do with some personification of one company liking their old user base more than another company so they continue support.
Nintendo makes money on hardware. Sony doesn't for the first year or two after release. Sony has no choice but to continue to pull from that legacy revenue stream or they'd lose 2 to 3 times as much money during the initial launch period of a new console.
I don't know how old you are or if you've had any business experience or courses but it's all economics. 95% of the moves you see from any company in the video game industry is economically based. You cannot look at these comapnies, or any big company for that matter really, in a humanistic perspective.
The rEVOLution is not being televised
