There's a lot of _very_ arguably false statements in here, esp around mongo and dynamo. Postgres still has to "rewrite" data if you need another index. In fact

There's a lot of _very_ arguably false statements in here, esp around mongo and dynamo. Postgres still has to "rewrite" data if you need another index. In fact it's about the same amount if you had to add an index for dynamodb... Also, when's the last time you changed your primary key in a postgres table? Or are you just adding indexes?