Having the ability to handle a large volume of random writes, relatively cheaply, makes building reliable, fully restartable software much simpler.
Many storage engines that I make use of are B trees or LSMs these days. These engines are usually selected because they provide very good read performance, and acceptable write performance.
Improved random access writes only make these engines more attractive and performant. For instance, boltdb, which is similar to LMDB, requires 2 iops to perform a durable write. In the benchmark for 4K random writes, Optane achieved 180,000 iops. This gives us 90,000 writes per second, sustained. Possibly more at peak, since presumably that's how they get the claimed write iops of 550,000.
That's a phenomenal number of writes. It makes in-memory stores like redis irrelevant for a wide range of applications that would have required it not long ago.