Why did Sony stop making the 60GB version of the PS3? Its the best version because it has backwards compatibility unlike the 80 and 40GB versions. Yes, it was expensive but people still bought it.
I think its probably because they make more money by selling PS1 and PS2 games in the Playstation store (not sure about the real name) than allowing people to play their old games for free. Of course, its the same with all video game companies, all they care about is the money.