[brugidou]

I support this answer. The reality is that outsourcing the devops work is simply moving from IaaS (Infrastructure as a Service, e.g EC2) to PaaS (Platform as a Service, like RDS, Heroku). You just won't deal with infrastructure, servers, network or operating systems anymore.

You will lose the ability to customize or use obscure frameworks.

On the other hand, you will simply have to do operations such as "increase the number of web workers", or "add more replication for this DB" which are high level.