The DBA is not dead! They just look and smell that way!
But in all seriousness, if your app uses a database, you are incompetent not to employ an expert to help with the database, whether advising on the query plan of those non-performant queries, or what is the best setup for the current stage of the business and app, they are very useful.
But in all seriousness, if your app uses a database, you are incompetent not to employ an expert to help with the database, whether advising on the query plan of those non-performant queries, or what is the best setup for the current stage of the business and app, they are very useful.