The post doesn't specify requirements or application level targets for performance. They show a couple of good latency improvements but don't describe the business or technical impact. The closest we get is this.

> If this database isn’t performing well enough, it can cause API errors and timeouts for our subscribers.

What are the SLO's? How was this being met (or not) before vs after the hardware upgrade? There's a lot of additional context that could have been added in this post. It's not a bad post but instead it simply reduces down to this new hardware is faster than our old hardware.