The lights are on
Why is this really even a question? Do you see the original Xbox, NES, SNES, N64, GameCube, or PS1 (PS2 is a special exception) being sold in stores any more? Most people end up buying the new hardware and abandoning the old once the new, shinier console comes out.
Besides, the only thing most people used the PSP for anyhow was hacking it and putting emulators on it.