> Regardless it looks like anyone choosing Aurora should not hold their breath for Mysql 8 or Postgres 10+ compatibility.

Current Aurora Postgres is compatible with pg 12.4; pg 10+ support has been around so long that several versions that support 10+ have already been EOL’d by Amazon. Even Serverless, which lags behind, is on 10.x.

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide...