There's still a use-case for them. High performance high reliability persistent messaging is one such use case where SSDs do not have the required endurance.

There's still a use-case for them. High performance high reliability persistent messaging is one such use case where SSDs do not have the required endurance. Solace builds their hardware messaging appliances with the Assured Delivery Blade that consists of an FPGA based board with supercap backed DRAM that dumps to flash on power failure and a couple of 10Gbps ports to mirror to another system. The end result is extremely low latency acknowledgement of non-volatile storage of persistent messages with unlimited endurance.