This article fails to mention the issue of needing a database. It doesn't matter how seamlessly your application can scale if your data backend won't scale with it.
They mention Cloud SQL, which is of course instance based and would run into scaling issues if your app got suddenly hammered. Not to mention, the cost isn't $0 if your app gets 0 traffic, you are going to have to pay to keep that running around the clock.
I realize some applications are very heavy on the app side and light on needing to hit the DB, but in my experience, that isn't very common.
They mention Cloud SQL, which is of course instance based and would run into scaling issues if your app got suddenly hammered. Not to mention, the cost isn't $0 if your app gets 0 traffic, you are going to have to pay to keep that running around the clock.
I realize some applications are very heavy on the app side and light on needing to hit the DB, but in my experience, that isn't very common.