Well yeah, of course. I can't understand why people reach for a bunch of bespoke databases where you need a whole other ecosystem of tooling and libraries to us

Well yeah, of course. I can't understand why people reach for a bunch of bespoke databases where you need a whole other ecosystem of tooling and libraries to use and monitor, can't have transactions across them, another single point of failure, your ORMs don't mix if you use one of those. The amount of work you need to do to make it not worth it is quite high assuming it can be done which they seem to have accomplished pretty easily by DIYing their own provisioned iops rds (not sure why they didn't try that).