Consumers have enjoyed record low memory prices for over nine months now in DDR2 memory. Over the past six months, even latest 4GB and 8GB kits have been finding new lows. There has been a continued demand for DDR2, even with all of the DDR3 support that's been cropping up.
Many Nvidia nForce and all AMD processors are still limited to DDR2 and even the new Intel P45 chipset still supports it, so it doesn't look like it will be going away any time soon. In fact, the P45 chipset only supports 8GB of DDR3 memory, while DDR2 gets 16GB!
But with the increased availability and decreased price, enthusiasts are faced with a new question: is a 4GB kit or even an 8GB kit worth the cash splash over a basic 2GB? What scenarios warrant the extra memory?