My 2cents …

Serverless computing removes you from having to provision a server yourself; you simply write functions, and the resources you need are automatically allocated to that function.

There is always a BUT:

… new applications are a good fit for serverless computing, old applications often are not—and migrating those old applications to serverless could be more work than enterprises bargained for …

Even if the languages are supported, it takes a huge effort to refactor an application to properly take advantage of serverless computing.

Quelle: Serverless computing: Don’t make the wrong choices | InfoWorld