It's really a question of how many replicas you have, if you're running with sync rep or not, and what your DR story is like. We've tested it before a few times at previous employers and are exploring it rolling it out for Crunchy Bridge currently. The NVMe storage is really nice it's great performance and the price balance of it is good as well. But it does come with nuances... I wouldn't let a user provision without HA for example. In cases for a standard app without crazy uptime requirements having a standby or 2 is wasted cash. So it isn't for everyone, but can be for some people.