Random Write Steady State
We can learn a lot from the random write steady state test, even if none of us will ever see this condition on a desktop. Here, we're looking for performance consistency. The Reactor delivers a steady stream of 4KB random writes, but spikes when the DRAM cache is able to accept some of the writes. The only part we don't like about this measurement is the low level of 4KB random write performance when the cache doesn't catch the data.
I guess because in some ways its so old school. (It saved money back then too.) Back in the "Home Computer" days card-edge connectors were used for expansion connections (on one side of the connection.) Retro consoles used it too with game carts. The PC used it then, and even still today, for expansion AND adding graphics. Back in the day Floppy drives, primarily 5.25" and larger used such a connection for data (and a molex for power.)
If that patent ever gets challenged, I dunno if it will hold-up because of all of that. In Modern storage though, the connector is, currently, unique though.