SSDs are superior to hard drives in every way but one. Hard drives are faster, lighter, and less fragile, but also more expensive.
SSD has been the only thing keeping hard drives alive, and that thread appears to be getting thinner by the day. SSD prices per gigabyte have been making a great increasing graph over the last few years: from $1.35 a gigabyte in 2012 to $0.53. That’s exactly what you’d expect from a technology starting to come of age. The interesting thing is that hard drive prices have stayed more or less the same, as you’d expect from a technology that’s been around for decades.
Simply put, hard drives and SSDs cost the same, and spinning magnetic platters cease to be a thing anyone carries around. This will be good for everyone, because it will make our PCs faster, less likely to break, more energy-efficient and quieter. This trend will happen for smaller drives sometime in 2017, which is when you can expect 256GB SSDs and HDDs to cost the same. Of course, there are caveats: this is classic data extrapolation, which is a fancy way of drawing lines to predict the future; there’s also the fact that HDDs are still getting bigger, and at the upper end, SSDs and HDDs have a long way to converge.