Backwards compatibility is a fan service, it says to people who already own the previous console that if they choose your console again the expensive games and controllers they purchased previously would work on the new console. Replace one console with another and still play the old games from the old system on the new with the previous investment acting like a trade-in off the cost of the new system. The backwards compatibility in the 60GB PS3 was an exercise in futility and a complete failure.
The backwards compatibility was fine for those who never owned a PS1/PS2, but for those who did the lack of a memory card reader and slots for the old controllers made backwards compatibility for most people who wanted it completely irrelevant. Most people will not go out and buy the adapter, either they won't know it exists, and most of those who do would find it too complicated to use.
The chain of backwards compatibility wasn't broken with the 40GB, it was broken with the 60GB PS3 which theoretically had full backwards compatibility. I would say its a strong bet that most people who owned a PS2 kept it when they got their full BC PS3 because they couldn't easily transfer their saved games to the new system so from that point on it didn't matter whether they got a PS3, a Wii or an Xbox 360 because they were always going to have to keep the PS2 around.
The backwards compatibility they did give us was horribly compromised and provided no net gain to Sony. The hardcore Sony owners now were always going to buy the system anyway and the less tech savvy masses who appreciated the simple convenience found it anything but convenient. In the end it was a terrible price to pay for something that did no-one any real good and their balance books show evidence of the full price they paid.
Tease.








