Huh. That sucks but also isn’t surprising. Seems like putting this in the cloud eliminates most of its benefits though. If you’re going to wait for that much latency you might as well use a “real” (traditional big complicated) rdbms.
For me, a lot of the draw is that it's cheaper than managed db services for small/toy projects of mine (that I don't want to use dynamo db for) - that and in a previous job it was useful as relatively temporary multi-tenant storage.