#AWSHistory
Even your history thing makes no sense, Aurora Postgres was launched 9 months after Mysql version in July 2015.
What? That's not what that comment says at all. They're saying that aurora mysql was a plausible interpretation of what OP moved from, before OP clarified.
https://aws.amazon.com/blogs/aws/highly-scalable-mysql-compa...
Aurora Postgres hit general availability October 2017. (Sorry, betas and early release offerings don't count.)
https://aws.amazon.com/blogs/aws/now-available-amazon-aurora...
Quick math… carry the two… compute the partial differential equation…
Looks like 3 YEARS between the release of Aurora MySQL and Aurora Postgres.
…which was November 2015.
https://aws.amazon.com/blogs/aws/now-available-amazon-aurora...
The majority of the time, it was identified as "aurora" in CloudFormation templates. 5.6 hit EOL in February of THIS YEAR, aka 2023.
https://aws.amazon.com/blogs/database/upgrade-amazon-aurora-...
So… that would make it the majority of time, wouldn't it? Why does this upset you so?