I don't think calling out the far end of the postgres scaling story is controversial. On the low end, you can add more hardware or improve queries/indexes, and

I don't think calling out the far end of the postgres scaling story is controversial. On the low end, you can add more hardware or improve queries/indexes, and the mid level works fine with a write master and read replicas, but once you get into multi-master/sharding it's definitely more involved than other systems, and if you just use postgres as a dumb data dump, maybe the value isn't there. It's all about the right tool for the job. Of course, there will always be fanboys who take things too far.