Times are changing, 10 years ago I would never have thought that self-tuning databases would be available as a packaged product. I was testing out SQL Server 2017 Automatic Tuning recently and I ended up with the following situation. Below shows an image from the query store.
I used to be on the fence regarding whether or not Automatic Tuning should be on as the default when creating Azure SQL Databases. A part of me never liked the idea of Azure creating/dropping indexes or forcing plans without my prior approval but then again if it happens to do the right thing at the right time then it’s a pleasurable experience.