Yep - currently rolling my own on GCE but would really love them to roll out managed service to handle failover. Hopefully now that their v2 has gone GA it releases someone to work on adding new db types.

Nope, but samhamilton has it right. Getting this in place was really the first step. While I personally like Postgres myself, it's still the case that MySQL dominates in terms of install base and dollars.

I think you're thinking of Cloud SQL v1. v2 is "just" a managed instance of MySQL 5.x (I think you can still lock to 5.6 if you're not ready for 5.7). The MySQL team at Google already open-sourced the semi-sync replication, etc. so it's not like it was ever "crazy" anyway.

Disclaimer: while I work on Google Cloud, I don't work on the Cloud SQL team.

A lot of companies use SQL server. I wouldn't be surprised if it has double the installed base of PostgreSQL. Especially among the more established firms that Google seems to be targeting in their sales effort.

They dont have managed SQL Server hosting, just images ready to go so you dont have to buy and install it yourself.

SQL Server also has a massive user base, especially within the large enterprises that Google is trying to get as customers.